# Question: The mean of a population of raw scores is 18

The mean of a population of raw scores is 18 (σx = 12).

(a) Using the z-table, what is the relative frequency of sample means above 24 when N = 30?

(b) What is the probability of randomly selecting a sample of 30 participants whose scores produce a mean above 24?

(a) Using the z-table, what is the relative frequency of sample means above 24 when N = 30?

(b) What is the probability of randomly selecting a sample of 30 participants whose scores produce a mean above 24?

**View Solution:**## Answer to relevant Questions

(a) What is sampling with replacement? (b) What is sampling without replacement? (c) How does sampling without replacement affect the probability of events, compared to sampling with replacement? (a) What are the advantage and disadvantage of two-tailed tests? (b) What are the advantage and disadvantage of one-tailed tests? Foofy claims that a one-tailed test is cheating because we use a smaller zcrit, and therefore it is easier to reject H0 than with a two-tailed test. If the independent variable doesn’t work, she claims, we are more likely ...For the following, identify the independent variable and the dependent variable and explain why we should use a parametric or nonparametric procedure? (a) When ranking the intelligence of a group of people given a smart ...(a) What is power? (b) Why do researchers want to maximize power? (c) What result makes us worry whether we have sufficient power? (d) Why is a one-tailed test more powerful than a two-tailed test?Post your question