Microsoft Excel was used on a set of data involving the number of defective items found in a random sample of 46cases of lightbulbsproduced during a morning shift at a plant. A manager wants to know if the mean number of defective light bulbs is greater than 20 during the morning shift. She will make her decision using a test with a level of significance of .10. The following information was extracted from the Microsoft Excel output:

n = 46

Mean = 28.00, Standard deviation: 25.92

Standard Error = 3.82

Null hypothesis: H0: 20

=0.10

df= 45

T test statistic = 2.09

One Tail upper critical value = 1.3006

p value = 0.021

What should the manager decide?

A. Reject the null

B. Do not reject the null

C. Accept the null

D. Not enough information provided