# Question

For each of the following, assume that the two samples are obtained from populations with the same mean, and calculate how much difference should be expected, on average, between the two sample means.

a. Each sample has n = 4 scores with s2 = 68 for the first sample and s2 = 76 for the second.

b. Each sample has n = 16 scores with s2 = 68 for the first sample and s2 = 76 for the second.

c. In part b, the two samples are bigger than in part a, but the variances are unchanged. How does sample size affect the size of the standard error for the sample mean difference?

a. Each sample has n = 4 scores with s2 = 68 for the first sample and s2 = 76 for the second.

b. Each sample has n = 16 scores with s2 = 68 for the first sample and s2 = 76 for the second.

c. In part b, the two samples are bigger than in part a, but the variances are unchanged. How does sample size affect the size of the standard error for the sample mean difference?

## Answer to relevant Questions

For each of the following, calculate the pooled variance and the estimated standard error for the sample mean difference. a. The first sample has n = 4 scores and a variance of s2 = 55, and the second sample has n = 6 scores ...Does posting calorie content for menu items affect people's choices in fast food restaurants? According to results obtained by Elbel, Gyamfi, and Kersh (2011), the answer is no. The researchers monitored the calorie content ...Downs and Abwender (2002) evaluated soccer players and swimmers to determine whether the routine blows to the head experienced by soccer players produced long-term neurological deficits. In the study, neurological tests were ...Two separate samples, each with n = 15 individuals, receive different treatments. After treatment, the first sample has SS = 1740 and the second has SS = 1620. a. Find the pooled variance for the two samples. b. Compute the ...One of the primary advantages of a repeatedmeasures design, compared to independent-measures, is that it reduces the overall variability by removing variance caused by individual differences. The following data are from a ...Post your question

0