Let x be the number of courses for which a randomly selected student at a certain university is registered. The probability distribution of x appears in the following table X 1 2 3 4 5 6 7 p(x) 0.03 0.04 0.09 0.26 0.38 0.15 0.05 It can be easily verified that 4:57 and 1.27 (a) Because - 3.30, the x values 1, 2 and 3 are more than 1 standard deviation below the mean: What is the probability that is more than 1 standard deviatic mean? 0.16 (b) What x values are more than 2 standard deviations away from the mean value (either less than x - 20 or greater than + 20) (select all that apply.) 4 SS 6 X (c) Wisat is the probability that is more than 2 Standard deviations away from its mean value? 0.03

Answer:

4

Step-by-step explanation:

I know this because if you try multiply each number there by 45 you would need to get the total of 180, but if you multiply 45 times 4 you may get 180. The answer you chose is wrong because it doesn't get to 180 with any number you try multiplying with that number you chose.  

The value of Standard Deviation is needed to calculate the minimum sample size accurately. If you have the value of Standard Deviation, you can substitute it into the equation to find the minimum sample size.

To determine the minimum number of CEOs that the journalist must survey to be within $50,000 of the true average annual salary, we need to consider the margin of error in the confidence interval.

The margin of error is determined by the z-value associated with the desired confidence level and the standard deviation of the population.

Given that the z-value associated with a 95% confidence interval is 1.96, we can use the following formula to calculate the margin of error:

Margin of Error = z-value * (Standard Deviation / sqrt(sample size))

To be within $50,000 of the true average annual salary, we can set up the equation:

$50,000 = 1.96 * (Standard Deviation / sqrt(sample size))

Solving for the sample size (number of CEOs):

sqrt(sample size) = (1.96 * Standard Deviation) / $50,000

sample size = (($50,000)^2 * (Standard Deviation)^2) / (1.96)^2

The value of Standard Deviation is needed to calculate the minimum sample size accurately. If you have the value of Standard Deviation, you can substitute it into the equation to find the minimum sample size.

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Answer:

y = 47

Step-by-step explanation:

All of the angles in a triangle must add up to 180. The angle marked 3y can help us find the missing angle of the triangle: 180-3y
Then you can make an equation to help solve for y:
50 + (2y-3) + (180-3y) = 180
Combine like terms:
227-y=180
y = 47

\(\quad \huge \quad \quad \boxed{ \tt \:Answer }\)

\(\qquad \tt \rightarrow \: y=47 \degree\)

____________________________________

\( \large \tt Solution \: : \)

\(\qquad \tt \rightarrow \:(2y - 3) + 50 = 3y\)

\(\qquad \tt \rightarrow \:2y - 3 + 50 - 3y = 0\)

\(\qquad \tt \rightarrow \:2y - 3y + 47 = 0\)

\(\qquad \tt \rightarrow \: - y = - 47\)

\(\qquad \tt \rightarrow \:y = 47 \degree\)

Answered by : ❝ AǫᴜᴀWɪᴢ ❞

The first property states that the Fourier transform of a function evaluated at a certain frequency is equal to 2π times the inverse Fourier transform of the function evaluated at the negative of that frequency.

The second property states that the Fourier transform of a modulated function is equal to the Fourier transform of the original function shifted by the modulation frequency.

To verify the given properties of the Fourier transform, we can use the definitions and properties of the Fourier transform. Here's how we can verify each property:

1. Property: (Fu)(ω) = 2π (F^-1u)(-ω)

To verify this property, we need to use the definitions of the Fourier transform and its inverse. Let's denote the Fourier transform operator as F and its inverse as F^-1.

According to the definition of the Fourier transform, for a function u(t), its Fourier transform is given by:

(Fu)(ω) = ∫[from -∞ to ∞] u(t) e^(-iωt) dt

Similarly, the inverse Fourier transform of a function U(ω) is given by:

(F^-1U)(t) = (1/2π) ∫[from -∞ to ∞] U(ω) e^(iωt) dω

Now, let's substitute -ω for ω in the inverse Fourier transform:

(F^-1u)(-ω) = (1/2π) ∫[from -∞ to ∞] u(t) e^(i(-ω)t) dt

= (1/2π) ∫[from -∞ to ∞] u(t) e^(iωt) dt

Comparing this with the Fourier transform, we see that (F^-1u)(-ω) is equal to (Fu)(ω) multiplied by 2π, which verifies the first property.

2. Property: (F(e^(iat)u))(ω) = (Fu)(ω + a)

To verify this property, we use the modulation property of the Fourier transform. According to this property, if u(t) has a Fourier transform U(ω), then the Fourier transform of e^(iat)u(t) is given by:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

Applying this property to the given expression, we have:

(F(e^(iat)u))(ω) = (Fu)(ω + a)

This verifies the second property.

In summary, we have verified both properties of the Fourier transform as stated.

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Answer:

3/20

Step-by-step explanation:

Of means multiply. When it says 3/10 of 4/8, it just means 3/10*4/8 which when multiplied across gives you 12/80. Which can be simplified to 3/20.

Hope this helps.

Answer:

The percentage of the students who have grade point averages that are no more than 1.82 is 2.5%

Step-by-step explanation:

The empirical rule states that for a normal distribution, 68% of the distribution are within one standard deviation from the mean, 95% are within two standard deviations from the mean and 99.7% are within three standard deviations from the mean.

Given that:

Mean (μ) = 2.62, Standard deviation (σ) = 0.4

68% are within one standard deviation = μ ± σ = 2.62 ± 0.4 = (2.22, 3.02)

95% are within two standard deviations = μ ± 2σ = 2.62 ± 2(0.4) = (1.82, 3.42)

The percentage of the students have grade point averages that are no more than 1.82 is 100% - [95% + (100% - 95%)/2] = 100% - 97.5% = 2.5%

Hima's selling price for each sheet of paper is ₹3.2, but Sharon was charged ₹2.9 per sheet. So, Sharon got a discount of:

sql

Copy code

Discount per sheet = Selling price per sheet - Sharon's price per sheet

                  = ₹3.2 - ₹2.9

                  = ₹0.3

Now, Sharon ordered 1250 sheets of paper, so the total discount she got is:

java

Copy code

Total discount = Discount per sheet x Number of sheets

              = ₹0.3 x 1250

              = ₹375

Therefore, Sharon got a total discount of ₹375 in this purchase.

\(x = 2 \\ y = 7\)

is the answer to:

\(y = 11 - 2x \\ 4x - 3y = - 13\)

_________________________________________

\(x = 5 \\ y = 2\)

is the answer to:

\(2x + y = 12 \\ x = 9 - 2y\)

_________________________________________

\(x = 3 \\ y = 5\)

is the answer to:

\(2x + y = 11 \\ x - 2y = - 7\)

_________________________________________

\(x = 7 \\ y = 3\)

is the answer to:

\(x + 3y = 16 \\ 2x - y = 11\)

Answer:

891

132 x 675

100

= 891

Step-by-step explanation:

Answer:

891

Step-by-step explanation:

Answer:

A. 36 cm

Step-by-step explanation:

Perimeter = SQ + RS + RQ

✔️Find SQ:

SN = SM = 10 cm (tangents drawn from an external point)

QL = QN = 2 cm (tangents drawn from an external point)

SQ = SN + NQ

SQ = 10 + 2 = 12 cm

✔️Find RS:

RS = RM + MS

RM = RL = 8 - 2 = 6 cm

MS = 10 cm (given)

Therefore,

RS = 6 + 10 = 16 cm

✔️RQ = 8 cm (given)

Thus:

Perimeter = SQ + RS + RQ

Perimeter = 12 + 16 + 8 = 36 cm

Answer:

1/2

Step-by-step explanation:

3 divided by 3 = 1

6 divided by 3 =2

3/6 ➡️  1/2

The correct answers are C & D

Hey there! I'm happy to help!

Train X takes out 1/4 of our journey.

Now, we have 3/4 of the journey left.

Train Y takes 3/4 of the last 3/4 of the journey. How much is that, let's just multiply the fractions!

3/4*3/4= 9/16

So, 9/16 of the total journey is done by Train Y.

A fourth of 16/16 is 4/16, so that leaves us with 3/16 left to go.

So, 3/16 of our total distance is equal to 10 km. Let's call our total distance d and set this up as an equation.

3/16d=10

Divide both sides by 3/16.

d= 53 1/3

We also remember that Train Y gave us 9/16 of our total journey, so we can multiply this by our total distance to see how far train Y went.

53 1/3 * 9/16= 30

So, A. Ahmad traveled 30 miles by Train Y and B. his total distance traveled is 53 1/3 miles.

Have a wonderful day and keep on learning! :D

Answer:

he value of the integral ∫ y tan(x) dx is y sin(x) + C.

Step-by-step explanation:

Property 8 of integrals states that if we have an integral of the form ∫ f(x) g'(x) dx, it can be rewritten as ∫ f(x) dg(x), where g(x) is an antiderivative of g'(x).

In this case, we have the integral ∫ y tan(x) dx. By applying Property 8, we can rewrite it as ∫ y d(sin(x)).

Now, integrating with respect to y while treating sin(x) as a constant, we get:

∫ y d(sin(x)) = y sin(x) + C,

where C is the constant of integration.

So, using Property 8, the value of the integral ∫ y tan(x) dx is y sin(x) + C.

Answer:

Decagon: 10 interior angles of 144 degrees each

144 x 10 = 1,440 degrees

Step-by-step explanation:

TRUE: Basketball players' height is seen as a continuous variable.

Yes, as lengths are continuous variables, the random variable does indeed refer to length.

Thus, Basketball players' height is seen as a continuous variable

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The most effective graphical representation of the above data would be a histogram.

A histogram is a graphic representation of the distribution of numerical data. In this case, data on the carbohydrate content of ten different tortilla sandwich wraps is acquired. The best option is a histogram because the data is numerical.

For categorical data, which is broken up into several categories and displayed as a fraction or percentage of the whole, a circle chart, also known as a pie chart, is the best option. The information offered is numerical rather than categorical, though.

Each individual data point is shown as a dot on a number line in a dot plot, also called a line plot. It may not be suitable for larger quantities of data, although being advantageous for an.

Numerical data can be arranged and displayed using a stem-and-leaf plot. For just ten data points, it might not be the ideal depiction, though.

Therefore, the most appropriate graphical representation for the provided data would be a histogram.

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The main idea behind statistical inference is that through the use of sample data, we are able to draw conclusions about the population from which the data was drawn (option c).

Statistical inference allows us to make inferences and draw conclusions about a larger population based on the analysis of a smaller representative sample.

By collecting data from a sample, we can use statistical methods to analyze and summarize the information. These methods include estimating population parameters, testing hypotheses, and making predictions.

The key assumption underlying statistical inference is that the sample is representative of the larger population, allowing us to generalize the findings to the population as a whole.

Statistical inference provides a way to make reliable and informed decisions, identify patterns and relationships, and make predictions about future observations based on the available data. It allows researchers, scientists, and decision-makers to make evidence-based conclusions and draw meaningful insights from limited observations.

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The statement is False, because the logarithm of a negative number is not defined. Option A is correct answer.

The given expression can be rewritten as log249 2 + log2X. As log249 2 is a positive value, adding a positive value to the expression will never result in a negative value. Therefore, the value of log2X can never be negative. But when X takes a negative value, the logarithm is not defined, which makes the statement false.

Option A is correct because the logarithm of a negative number is not defined in the real number system. Option B is incorrect because (-7)² equals 49 is irrelevant to the given statement. Option C is also incorrect because log7(-7) is not defined. Option D is also incorrect because log7(-7) is not defined, so the equation log7(-7) - 1 is meaningless. Therefore, option A is the only correct option.

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The given statement "the probability of the union of two events occurring can never be more than the probability of the intersection of two events occurring." is False.

The union of two events A and B represents the event that at least one of the events A or B occurs. The probability of the union of two events can be calculated using the formula:

P(A or B) = P(A) + P(B) - P(A and B)

On the other hand, the intersection of two events A and B represents the event that both events A and B occur. The probability of the intersection of two events can be calculated using the formula:

P(A and B) = P(A) * P(B|A)

where P(B|A) is the conditional probability of B given that A has occurred.

It is possible for the probability of the union of two events to be greater than the probability of the intersection of two events if the two events are not mutually exclusive.

In this case, the probability of both events occurring together (the intersection) may be relatively small, while the probability of at least one of the events occurring (the union) may be relatively high.

In summary, the probability of the union of two events occurring can sometimes be greater than the probability of the intersection of two events occurring, depending on the relationship between the events.

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A researcher is planning an A/B test and is concerned about only one confound between the day of the week and the treatment. In order to control for the confound, she is most likely to design the experiment using a blocked design.

A/B testing is a statistical experiment in which a topic is evaluated by assessing two variants (A and B). A/B testing is an approach that is commonly used in web design and marketing to assess the success of modifications to a website or app. This test divides your visitors into two groups at random, with one group seeing the original and the other seeing the modified version.

The success of the modification is determined by comparing the outcomes of both groups of users.The researcher should utilize a blocked design to control the confound. A blocked design is a statistical design technique that groups individuals into blocks or clusters based on factors that may have an impact on the outcome of an experiment.

By dividing the study participants into homogeneous clusters and conducting A/B testing on each cluster, the researcher can ensure that the confounding variable, in this case, the day of the week, is equally represented in each group. This will aid in the reduction of the influence of extraneous variables and improve the accuracy of the research results.

In summary, the most probable experiment design that the researcher is likely to use to control for the confound between the day of the week and the treatment is a blocked design that will allow the researcher to group individuals into homogeneous clusters and conduct A/B testing on each cluster to ensure that confounding variable is equally represented in each group, thus controlling the confound.

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Answer:

68%

Step-by-step explanation:

In normal distribution, the empirical rule (aka 68-95-99.7 rule) describes the approximate proportion of data that falls within certain distances from the mean of a normal distribution. Specifically, the rule states that:

Without changing the value, Marcus can add 3 positive counters and 3 negative counters. Option d is correct.

To determine the difference -8 - 3 (+3), Marcus wants to use a model with counters. He starts with 8 negative counters, and in order to add 3 positive counters without changing the value, he can add 3 positive counters and 3 negative counters.

By adding 3 positive counters, he is increasing the value by 3. However, since he wants to maintain the same value, he also needs to add 3 negative counters. This ensures that the net change in value remains zero.

So, by adding 3 positive counters and 3 negative counters to the model, Marcus can represent the difference -8 - 3 (+3) without changing the overall value. Therefore, d is correct.

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Answer: 16

Step-by-step explanation:

1/5 x 70 = 14
70 - 14 = 56
5/7 x 56 = 40
56 - 40 = 16

Answer:

16

Step-by-step explanation:

Yesterday, the bookstore sold 1/5 of the 70 copies, which is 70 * 1/5 = 14 copies.

After selling 14 copies, the bookstore was left with 70 - 14 = 56 copies.

Today, the bookstore sold 5/7 of what remained, which is 5/7 * 56 = 40 copies.

So, the bookstore has 56 - 40 = 16 copies left.

Step-by-step explanation:

(8.4 * x * 10¹⁰) / (3 * x * 10⁷)

= (8.4/3) * (x/x) * (10¹⁰/10⁷)

= 2.8 * 1 * 10³

= 2.8 * 10³.

Answer:

\( \frac{8.4 \times {10}^{10} }{3 \times {10}^{7} } \\ = \frac{8.4}{3} \times \frac{ {10}^{10} }{ {10}^{7} } \\ = 2.8 \times {10}^{3} \\ = \boxed{2800}\)

Answer: 9x(3+1)/6-5

Step-by-step explanation: 9x(3+1)= 36

36/6-5=1

The Expression is 9 x (3+1)/ 6 -5 which gives value 1.

BODMAS rule is an acronym that is used to remember the order of operations to be followed while solving expressions in mathematics. It stands for B - Brackets, O - Order of powers or roots, (in some cases, 'of'), D - Division, M - Multiplication A - Addition, and S - Subtraction. It means that expressions having multiple operators need to be simplified from left to right in this order only.

Given:

9 x 3 + 1 divide by 6 - 5

So, we can write it as

9 x (3 + 1) ÷ 6 -5

Using the BODMAS rule

9 x (3+ 1)

= 9 x 4

and, (9 x 4) /6

= 36/6

= 6

and, 6-5 = 1

Hence, the Expression is 9 x (3+1)/ 6 -5.

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Answer:

it should be c = 5f/9 - 160/9 if solving for c.