Crowdly
Додати до Chrome
Construct the indicated confidence interval for the difference between the two p...
✅ Перевірена відповідь на це питання доступна нижче. Наші рішення, перевірені спільнотою, допомагають краще зрозуміти матеріал.
Construct the indicated confidence interval for the difference between the two population means. Assume that the assumptions and conditions for inference have been met.A researcher was interested in comparing the number of hours of television watched each day by two-year-olds and three-year-olds. A random sample of 18 two-year-olds and 18 three-year-olds yielded the data.
| 2 year old | 3 year old |
average hours TV/day | 1.25 | 1.44 |
standard deviation | 0.81 | 0.78 |
sample size | 18 | 18 |
Find a 95% confidence interval for the difference, μ2 - μ3, between the mean number of hours for two-year-olds and the mean number of hours for three-year-olds.
Use the conservative (lesser n-1) degrees of freedom.