The figure shows critical value cutoffs in the lower and upp

The figure shows critical value cutoffs in the lower and upper tails of the t distribution. The null hypothesis cannot be rejected if the observed t value lies in:

1- Area A or Area B

2- Area B or Area C

3- Area C or Area D

4- Area A or Area D

5- Area D

Solution

Here crtitcal region are area A and area D. If t-value is in area A or Area D, we reject the null hypothesis.

So if t values lies in area B or area C, then we fail to reject the null hypothesis. So option 2 is correct.