The options below give information about three different distributions and samples taken from them: I. Population...
The options below give information about three different distributions and samples taken from them:
I. Population approximately normally distributed, population standard deviation known, sample size n=10
II. Population approximately normally distributed, population standard deviation unknown, sample size n=10
III. Population distribution skewed right, population standard deviation unknown, sample size n=50
Which of these three samples could be used to create a confidence interval for the mean of the respective population? You may assume that the population sizes are all greater than 500 and that the samples have been taken randomly.
I and III only
I and II only
I, II, and III
III only
I only
Homework Answers
All I, II and III are correct because confidence interval can be constructed in all such cases.
Option C is correct.
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The options below give information about three different
distributions and samples taken from them:
I. Population...
Random samples of size 55 are taken from a normally distributed population that has 425 elements,...
Random samples of size 55 are taken from a normally distributed population that has 425 elements, a population mean of 20, and a population standard deviation of 7. What is the standard deviation of the sampling distribution of the sample means?
Random samples of size 55 are taken from a normally distributed population that has 425 elements,...
Random samples of size 55 are taken from a normally distributed population that has 425 elements, a population mean of 20, and a population standard deviation of 7. What is the standard deviation of the sampling distribution of the sample means?
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George and Charlotte are constructing sampling distributions. George’s parent population is strongly negatively skewed, and he...
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If random samples of size n = 36 are drawn from a nonnormal population with finite...
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A sample of size 81 is taken from a population with unknown mean and standard deviation...
A sample of size 81 is taken from a population with unknown mean and standard deviation 4.5. In a test of Ho: u = 5 vs. Ha: u < 5, if the sample mean was 4, which of the following is true? (i) We would reject the null hypothesis at a =0.01. (ii) We would reject the null hypothesis at a = 0.05. (iii) We would reject the null hypothesis at a = 0.10. O only (i) O only (iii)...
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A simple random sample of size n 43 is obtained from a population that is skewed left with = 54 and 06. Does the population need to be normally distributed for the sampling distribution of x to be approximately normally distributed? Why? What is the sampling distribution of Does the population need to be normally distributed for the sampling distribution of x to be approximately normally distributed? Why? O A. No. The central limit theorem states that only if the...
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