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1) Researchers wanted to see if people who exercise regularly sleep better than people who don't....

1) Researchers wanted to see if people who exercise regularly sleep better than people who don't. They took a random sample of adult males and surveyed them about their exercise routine and their sleep duration. Is there a statistically significant difference of quality of sleep between those who exercise and those who don’t? Summarized data are seen below. Conduct a hypothesis test and construct a 95% confidence interval for the population difference.

Sample Mean Exercise 7.2 hrs; Sample Mean No Exercise 6.4 hrs

Sample SD Exercise 1.1 hrs; Same SD No Exercise 1.6 hrs

N Exercise 160; N No Exercise 210

Math   Statistics-And-Probability   
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