PSYC 21621 Chapter Notes - Chapter 7/8: Standard Deviation

• School: Kent State University
• Department: Psychology
• Course: PSYC 21621
• Professor: Jaruda

Document Summary

For a population with a standard deviation of 20, how large is a sample necessary to have a standard error that is equal to 5 points: 16. If you have a sample of n=25, what is the standard error if the population standard deviation is 60: 12. You take a random sample of n=25 people. What is the probability that your sample mean will be m=106 or greater: . 0228. You take a random sample of n=9 people. What is the probability that your sample mean will be m=95 or less: . 1587. What sample size (n=?) is necessary to get a standard error of 2, if the population standard deviation is 20: 100. What is the probability that your sample mean will be 54 or higher, if you have a randomly drawn sample size of n=4: . 2119. Assume that, for a given test, the population mean is 50 and the population standard deviation is 10.