1. State Your Null and Research Hypothesis (1pt)
2. Select Your Level of Significance (1pt)
3. Establish a Critical Value (1pt)
4. Calculate Your Test Statistic (1pt)
5. Make a Decision (1pt)

1)A regional Girl Scout chapter would like to know if their cookie sales differ from the Council average. After sampling 56 Girl Scout troops, you find an average of $1,497 in sales, with a standard deviation of $76.52. The Council average is $1,502 in sales, with a standard deviation of $80.66.

2)An experimental drug designed to improve memory is in the final stages of trial testing. You have been hired to see if this drug influences the performance of rats in completing a maze. You give the experimental drug to 347 rats and find an average time of 40.28 seconds, with a standard deviation of 3.32 seconds. You then give a placebo to 360 different rats and find an average time of 39.67 seconds, with a standard deviation of 2.98 seconds.