Answer Happy

ce The average person aged 15 or older gets 8 hours and 23 minutes (503 minutes) of sleep per night. To test if this average has changed recently, a random sample of 62 people aged 15 years or older was selected, and the number of minutes they slept recorded. Assume the standard deviation of hours of sleep is 61 minutes. Using a=0.20, complete parts a through c below. a. Explain how Type I and Type II errors can occur in this hypothesis test. A Type I error can occur when the researcher concludes the average hours of sleep changed, but the the average hours of sleep did not change. A Type Il error can occur when the researcher concludes that the average hours of sleep did not change, when, in fact, the average hours of sleep changed. b. Calculate the probability of a Type Il error given the actual average hours of sleep is 507 minutes. The probability of committing a Type Il error is. (Round to three decimal places as needed.)