x f

10 2

9 3

8 3

7 5

6 6

5 4

4 3

3 2

2 2

Assume that the 30 scores are the reading comprehension test scores of a Grade 3 class in 2020. You want to determine whether the mean of this class that you obtained above is better than the mean of all the Grade 3 classes during the past 5 years, 2015-2019. The mean was = 5 with = 2. Conduct the five-step hypothesis test, using a two-tailed test with .05. Based on your calculation, is this year's Grade 3 class average better than the average of the classes over the past five years?