Question: The following table presents the mean cumulative weight loss in grams for 60 patients receiving propranolol and for 121 control patients following sweating during insulin-induced hypoglycemia.

Mean loss weight between treatment and control for 91 patients during insulin induced hypoglycemia

Note: you can assume equal variances between the two groups

a) Provide a 95% confidence interval for the mean weight loss for each group.

b) Using a two-sided alternative, do the data present sufficient evidence to conclude that the mean cumulative weight loss is different for the two groups? (Use a = 0.05)

c) Write out your conclusion in words as you would present them in a report of the findings.

d) Perform the same hypothesis test changing the significance (alpha) level to .01 (a =0.01). Does your result change?