Independent Samples t-Test (equal sample sizes)

1. A biologist hypothesizes that Winnipeg chipmunks are able to store more nuts than Brandon chipmunks. The biologist tests a sample of 5 chipmunks of each type, counts the number of nuts stored, and compares the groups. The data is presented below. Calculate the t-value and compare it to the critical t-value and indicate whether the test is significant or not. Assume a one-tailed hypothesis with = .05. Based on these results, how do Winnipeg chipmunks and Brandon chipmunks compare when it comes to storing nuts? (4 marks)

Winnipeg: 33 40 25 28 34

Brandon: 27 31 24 26 32

Calculate the effect size (i.e., Cohen's d) and indicate the relative size of the effect. (1 mark)