A sample of size 20 yields a sample mean of 23.5 and a sample standard deviation of 4.3.

Test H0: Mean 25 at = 0.10. HA: Mean < 25. This is a one-tailed test with lower reject region bounded by a negative critical value.

Select one of the following answers:

a) Pvalue 0.135. H0 not rejected. Conclude mean 25 plausible

b) Pvalue 0.932. H0 not rejected. Conclude mean 25 plausible

c) Pvalue 0.068 H0 rejected. Conclude mean < 25

d) None of the other answers are correct.