Samsung claims the GalaxyS9 will last for more than 8 hours of talk time when the battery is fully charged. To test this claim a sample of n = 18 phones were tested. The results showed a sample mean of 8.2 hours and a sample standard deviation of 0.4 hour. The population standard deviation is UNKNOWN.Conduct the hypothesis test using a 0.05 level of significance.

H0: 8 hours

HA: > 8 hours

The t CRITICAL VALUE(you may use Appendix F or Excel)for the hypothesis test is:

Group of answer choices

2.1098

1.645

1.96

1.7396

Using the Samsung scenario in question 14 above, what is the calculated value of the t test statistic?

Group of answer choices

-0.12

0.12

2.12

-2.12