Description
Explanation & Answer
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H0 : mean after the course is equal to the mean before the course
H1 : Mean after course is greater than the mean before the course
since the data is collected from the same group of salespeople we use a paired t-test for the means.
using excel the following results were obtained
t-Test: Paired Two Sample for Means | ||
Column1 | before | after |
Mean | 15.6 | 17.8 |
Variance | 10.3 | 20.7 |
Observations | 5 | 5 |
Pearson Correlation | 0.849215476 | |
Hypothesized Mean Difference | 0 | |
df | 4 | |
t Stat | -1.97565832 | |
P(T<=t) one-tail | 0.059696702 | |
t Critical one-tail | 2.131846786 | |
P(T<=t) two-tail | 0.119393404 | |
t Critical two-tail | 2.776445105 |