An experimenter used a two-tailed test to test a null hypothesis stating that u=u0
The population is normally distributed, and its variance is unknown. A random sample
of 5 observations was employed,and the sample's result was t(x~)=-2.611.
What can we conclude about this result?


a The result is significant at the 0.1-level and is not significant at the 0.05 level

b The result is significant at the 0.05 level and is not significant at the 0.02 level

c The result is significant at the 0.02 level and is not significant at the 0.01 level

d The result is not significant because its direction si contrary to that of H1

です。よろしくお願いします。