Solution :
The sample size needed to be 95% confident that the standard deviation is within 30% of the population standard
deviation is 21 .
Option D)
Assume that the sample is a simple random sample obtained from a normally distributed population of...
Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviation is within 30% of the population standard deviation. A histogram of a sample of those arrival delays suggests that the distribution is skewed, not normal. How does the distribution affect the sample size? To be 95% confident that s...
Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use f of the To he 9546 confident that s is. within table below to find the minimum sample size needed to be 95% confident that the sample standard deviation is within 5 % A histogram of a sample of those arrival delays suggests that the distribution is skewed, not normal. How does the distribution affect the sample size?...
Question Help Assume that the sample is a simple random sample obtained from a normally distributed population of flight delays at an airport. Use the table below to find the minimum sample size needed to be 95% confident that the sample standard deviation is within 1% of the population standard deviation. A histogram of a sample of those arrival delays suggests that the distribution is skewed, not normal. How does the distribution affect the sample size? To be 95% confident...
Question Help Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviations is within 40% of o. Is this sample size practical? To be 95% confident that s is within 1% 5% 10% 20% 30% 40% 50% of the value of the sample size 19,205 768 192 n should...
7.3.19 Question Help * Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 40% of ?. Is this sample size practical? To be 95% confident that s is within | 1% | 5% | 10% | 20% | 30% | 40% | 50% | of...
Assume that the sample is a simple random sample obtained from a normally distributed population of IQ scores of statistics professors. Use the table below to find the minimum sample size needed to be 99% confident that the sample standard deviation s is within 1% of Is this sample size practical? To be 95% confident that s is within of the value of ơ, the sample size n should be at least To be 99% confident that s is within...
Assume that the sample is a simple random sample obtained from a normally distbuted population of IQsores of stics professors. Use the below to find the minimum sample size needed to be 95% confident that the sample standard deviations is within 40% of a Is this sample size practical To be 95% confident that is within 13 % 100 2 3 4 5 of the value of the sample size I should be at least 19.205 768 1024 21 28...
simple random sample of size n is drawn from a population that is normally distributed. The sample mean, X. is found to be 111, and the sample standard deviation is found to be 10. a) Construct a 95% confidence interval about if the sample size, n, is 28. b) Construct a 95% confidence interval about if the sample size, n, is 11 c) Construct a 90% confidence interval about if the sample size, n, is 28 ) Could we have...
A simple random sample of size nis drawn from a population that is normally distributed. The sample mean, X, is found to be 106, and the sample standard deviations, is found to be 9. (a) Construct a 95% confidence interval about if the sample size, n, is 26 (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 26 (d) Should the confidence...
A simple random sample of size n is drawn from a population that is normally distributed. The sample mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10 (a) Construct a 95% confidence interval about if the sample size, n, is 25. (b) Construct a 95% confidence interval about if the sample size, n, is 13 (c) Construct a 90% confidence interval about if the sample size, n, is 25. (d) Could...