# Question

A random sample is selected from a normal population with a mean of µ = 30 and a standard deviation of s = 8. After a treatment is administered to the individuals in the sample, the sample mean is found to be µ = 33.

a. If the sample consists of n = 16 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05.

b. If the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05.

c. Comparing your answers for parts a and b, explain how the size of the sample influences the outcome of a hypothesis test.

a. If the sample consists of n = 16 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05.

b. If the sample consists of n = 64 scores, is the sample mean sufficient to conclude that the treatment has a significant effect? Use a two-tailed test with a = .05.

c. Comparing your answers for parts a and b, explain how the size of the sample influences the outcome of a hypothesis test.

## Answer to relevant Questions

A random sample of n = 25 scores is selected from a normal population with a mean of µ = 40. After a treatment is administered to the individuals in the sample, the sample mean is found to be µ = 44. a. If the population ...The spotlight effect refers to overestimating the extent to which others notice your appearance or behavior, especially when you commit a social faux pas. Effectively, you feel as if you are suddenly standing in a spotlight ...A random sample of n = 16 scores is obtained from a population with a mean of µ = 45. After a treatment is administered to the individuals in the sample, the sample mean is found to be µ = 49.2. a. Assuming that the sample ...Explain why t distributions tend to be flatter and more spread out than the normal distribution. A researcher conducts an independent-measures study comparing two treatments and reports the t statistic as t(25) = 2.071. a. How many individuals participated in the entire study? b. Using a two-tailed test with a = .05, is ...Post your question

0