Question
1.) Past research has found that 'Hours of sleep within the population of the US has a Normal Distribution with a mean of 7 and
1.) Past research has found that 'Hours of sleep" within the population of the US has a Normal Distribution with a mean of 7 and a Standard Deviation of 1. Using the percentages listed in the normal distribution (34.13, 13.59, 2.15, .13) What is the probability that we would have a subject report having 8 or more hours of sleep? Type a answer as a statement within a percentage
2.) If we wanted to determine the appropriate sample size for looking at this relationship based on our alternative hypothesis, with Power 80%, Alpha set at 5%, and a large effect size of 0.8, how many people would we need to part in our study?
Alternative hypothesis: Hours of sleep have a significant effect on the consumption of coffee in a day.
Data:
Ave Cups Coffee | Avg Hours Sleep |
1 | 8 |
2 | 8 |
3 | 7 |
5 | 5 |
2 | 7 |
4 | 6 |
3 | 6 |
8 | 4 |
1 | 9 |
5 | 6 |
5 | 5 |
2 | 7 |
6 | 4 |
2 | 8 |
4 | 6 |
1 | 7 |
2 | 7 |
3 | 6 |
4 | 5 |
5 | 5 |
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