Suppose the mean GPA of BYU-Idaho students is 3.5 and the standard deviation is 0.7. It is wellknown that this distribution is left-skewed. A random sample of n = 13 students will be drawn.What is the shape of the sampling distribution of sample means?O Right SkewedO Left SkewedO NormalO The distribution shape cannot be determined from the information given.

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Answered: Suppose the mean GPA of BYU-Idaho…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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20. Sampling distribution. From 1975 through 2016, the mean gain of the Down jones industrial average was 470. A random sample of 32 years is selected from population. What is the probability that the mean gain for the sample was between 200 and 500. The standard deviation of population is 1215
The mean weekly earnings of all female workers in a state is $710 and the mean weekly earnings of all male workers in the same state is $760. The standard deviations of the weekly earnings are $86 for the females and $106 for the males. Suppose we take one sample of 316 female workers and another sample of 329 male workers from this state. 1.1. By hand, what is the mean of the sampling distribution of the difference between the mean weekly earnings for females and males? 1.2. By hand, what is the standard deviation of the sampling distribution of the difference between the mean weekly earnings for females and males, rounded to two decimal places?
Sadie deals 5 cards from a standard deck of 52 cards. She would like to deal as many spades as possible. Is it reasonable to approximate this distribution with a normal distribution? Give a reason.
A distribution has a mean of 9, a median of 9, and a mode of 9. What is the shape of this distribution? 1. Positively skewed 2. Negatively skewed 3. Perfectly symmetrical 4. None of the above
Which of the following is true regarding the sampling distribution of the mean for a large sample size? O It has a normal distribution with the same mean and standard deviation as the population. O It has the same shape, mean, and standard deviation as the population. O It has the same shape and mean as the population, but has a smaller standard deviation. O It has a normal distribution with the same mean as the population but with a smaller standard deviation.
In general, the standard error of the sampling distribution is __________the standard deviation from the related population distribution.. Group of answer choices unrelated to smaller than larger than equal to
The distribution of the number of motor vehicles per household in the United States (the population) and sampling distributions of the mean for samples of size 4 and 10 are shown in below. A.Which distribution is which? Make a rough estimate of the mean and standard deviation of each distribution. Explain the reasons of your choices.b. The mean of the population is about 1.7. Theoretically, what is the mean of the sampling distribution for samples of size 4? Of size 10? Are these computed means consistent with your estimates of the means in the histograms? Briefly explain.c. The standard deviation of the population is about 1. Theoretically, what is the Standard Error (SE) of the sampling distribution for samples of size 4? Of size 10? Are these computed SEs consistent with your estimates of the SEs in the histograms? Briefly explain.d. Compare the shapes of the three distributions. Are the shapes consistent with the Central Limit Theorem? Briefly explain.
The distribution of income in some Third World countries is considered very right skewed (many very poor people, very few middle income people, and even fewer wealthy people). Suppose we pick a country with a severely right skewed distribution. Let the average salary be $2,000 per year with a standard deviation of $8,000. We randomly survey 1,000 residents of that country. a. What is the sampling distribution of the sample mean, including name of the distribution, its mean, error, and standard ?
If the sample size is 100 and the population standard deviation is 20, then the standard deviation of the sampling distribution for means is 2. O True O False
Salaries for teachers in a particular state have a mean of $ 42000 and a standard deviation of $ 6900. Hint for parts a and b a. If we randomly select 15 teachers from that district, can you determine the sampling distribution of the sample mean? No C If yes, what is the name of the distribution? normal The mean? The standard error? b. If we randomly select 68 teachers from that district, can you determine the sampling distribution of the sample mean? If yes, what is the name of the distribution? The mean? The standard error?
Answer number 4 only..
Suppose a random sample of size is selected from a population that is normally distributed with a mean of 7.3 and a standard deviation of 0.82. Give the mean and the standard deviation of the sampling distribution of the sample mean. A. 8.9; 0.29 B. 7.3; 0.29 C. 7.3, 0.82 D. 8.9, 0.82

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