6.-. What size should a sample be to estimate the average of a population that follows...
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6.-. What size should a sample be to estimate the average of a
population that follows...
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample proportion...
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample proportion to be normally distributed? 5. If a population is slightly skewed and my sample size is 12, is the sample normally mean distributed? me a normal distribution for If n-83 what is the smallest population size N that will give 6.
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample...
6. A sample of size n- 200 has a known population standard deviation of 15.0. The...
6. A sample of size n- 200 has a known population standard deviation of 15.0. The population appears to be skewed. Determine whether a margin of error should be calculated using a critical value of za, a critical value of ta/2, or neither. Oa critical value of ta2 O a critical value of za O neither 7. The mean of a sample size n 35 is 1860. The standard deviation of the sample is 102 and the population is normally...
1. Explain the relationship between sample size and standard error. 2. You have a normal population...
1. Explain the relationship between sample size and standard error. 2. You have a normal population with a u = 50 and o = 9. You obtain all possible random samples, each with n = 30, from this population and calculate each sample's mean. What will the average value of all the sample means be? a) 50 b) 5.56 c) 30.49 d) Cannot tell without more information 3. You are sampling from a distribution of scores that is positively skewed....
How large of a sample is needed to estimate the mean of a normally distributed population...
How large of a sample is needed to estimate the mean of a normally distributed population of each of the following? a. ME=88; σ=49; α=0.10 b. ME=16; σ=49; α=0.10 c. Compare and comment on your answers to parts (a) and (b). a. n=__ (Round up to the nearest integer.) b. n=__ (Round up to the nearest integer.) c. Choose the correct answer below. A. Since the standard deviation and significance level are the same in (a) and (b), the required...
How large of a sample is needed to estimate the mean of a normally distributed population of each of the following? a....
How large of a sample is needed to estimate the mean of a normally distributed population of each of the following? a. ME=88; σ=49; α=0.10 b. ME=16; σ=49; α=0.10 c. Compare and comment on your answers to parts (a) and (b). a. n=__ (Round up to the nearest integer.) b. n=__ (Round up to the nearest integer.) c. Choose the correct answer below. A. Since the standard deviation and significance level are the same in (a) and (b), the required...
Suppose a random sample of size 40 is selected from a population with σ = 8....
Suppose a random sample of size 40 is selected from a population with σ = 8. Find the value of the standard error of the mean in each of the following cases. (Use the finite population correction factor if appropriate. Round your answers to two decimal places.) (a) The population size is infinite. (b) The population size is N = 40,000. (c) The population size is N = 4,000. (d) The population size is N = 400.
A simple random sample of size n=74 is obtained from a population with 82 and 8-6...
A simple random sample of size n=74 is obtained from a population with 82 and 8-6 Does the population need to be normally distributed for the sampling distribution of to be approximately normally distributed? Why? What is the sampling distribution of i? Does the population need to be normally distributed for the sampling distribution of to be approximately normally dibuted? Why? O A. No because the Central Limit Theorem states that only if the shape of the underlying population is...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.2. Assume the standard deviation of the GPA for the student population is 25 The sample size needed is (Round up to the nearest integer.) Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin...
A simple random sample of size n=74 is obtained from a population with u=67 and 5...
A simple random sample of size n=74 is obtained from a population with u=67 and 5 = 6. 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 x? Does the population need to be normally distributed for the sampling distribution of x to be approximately normally distributed? Why? A. Yes because the Central Limit Theorem states that the sampling variability of nonnormal populations...
A random sample of size 137 was taken from a population with a population mean 25...
A random sample of size 137 was taken from a population with a population mean 25 and a population standard deviation 5. Determine each of the following about the sampling distribution of the sample mean. Round your answer to at least 3 decimal places where appropriate. a) μx_= b) σx_= c) Can we conclude that the sampling distribution of the sample mean is approximately normal? YesNoClick for List
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample proportion to be normally distributed? 5. If a population is slightly skewed and my sample size is 12, is the sample normally mean distributed? me a normal distribution for If n-83 what is the smallest population size N that will give 6.
4. Suppose the population proportion is p = .6 and N=212000. What sample size is required for the sample...
6. A sample of size n- 200 has a known population standard deviation of 15.0. The population appears to be skewed. Determine whether a margin of error should be calculated using a critical value of za, a critical value of ta/2, or neither. Oa critical value of ta2 O a critical value of za O neither 7. The mean of a sample size n 35 is 1860. The standard deviation of the sample is 102 and the population is normally...
1. Explain the relationship between sample size and standard error. 2. You have a normal population with a u = 50 and o = 9. You obtain all possible random samples, each with n = 30, from this population and calculate each sample's mean. What will the average value of all the sample means be? a) 50 b) 5.56 c) 30.49 d) Cannot tell without more information 3. You are sampling from a distribution of scores that is positively skewed....
A simple random sample of size n=74 is obtained from a population with 82 and 8-6 Does the population need to be normally distributed for the sampling distribution of to be approximately normally distributed? Why? What is the sampling distribution of i? Does the population need to be normally distributed for the sampling distribution of to be approximately normally dibuted? Why? O A. No because the Central Limit Theorem states that only if the shape of the underlying population is...
Determine the sample size needed to construct a 95% confidence interval to estimate the average GPA for the student population at a college with a margin of error equal to 0.2. Assume the standard deviation of the GPA for the student population is 25 The sample size needed is (Round up to the nearest integer.) Determine the sample size n needed to construct a 90% confidence interval to estimate the population proportion for the following sample proportions when the margin...
A simple random sample of size n=74 is obtained from a population with u=67 and 5 = 6. 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 x? Does the population need to be normally distributed for the sampling distribution of x to be approximately normally distributed? Why? A. Yes because the Central Limit Theorem states that the sampling variability of nonnormal populations...
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