| << Chapter < Page | Chapter >> Page > |
Card 40 / 51:
Previously, an organization reported that teenagers spent 4.5 hours per week, on average, on the phone. The organization thinks that, currently, the mean is higher. Fifteen randomly chosen teenagers were asked how many hours per week they spend on the phone. The sample mean was 4.75 hours with a sample standard deviation of 2.0. Conduct a hypothesis test. At a significance level of a = 0.05, what is the correct conclusion?
There is enough evidence to conclude that the mean number of hours is more than 4.75There is enough evidence to conclude that the mean number of hours is more than 4.5There is not enough evidence to conclude that the mean number of hours is more than 4.5There is not enough evidence to conclude that the mean number of hours is more than 4.75
| Previous Card | ← Previous Card Button |
| Next Card | → Next Card Button |
| Flip Card | ↑ / ↓ / Return / Space |
Notification Switch
Would you like to follow the 'Introductory statistics' conversation and receive update notifications?
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|