Question

Previous Problem Problem List Next Problem (1 point) Using diaries for many weeks, a study on the lifestyles of visually impaired students was conducted. The students kept track of many lifestyle variables including how many hours of sleep obtained on a typical day. Researchers found that visually impaired students averaged 9.63 hours of sleep with a standard deviation of 1.76 hours. Assume that the number of hours of sleep for these visually impaired students is normally distributed. (a) What is the probability that a visually impaired student gets less than 6.6 hours of sleep? answer: (b) What is the probability that a visually impaired student gets between 6.7 and 9.64 hours of sleep? answer: (c) Fourty percent of students got loss than how many hours of sleep on a typical day? answer: hours Note: You can earn partial credit on this problem. According to a study by Georgetown University, 71% of college students have jobs during the school year. You suspect that the percentage is different a UWEC. You take a sample of 100 UWEC students and find that 80 of them have jobs during the school year. a. Which of the following alternative hypotheses is most appropriate? A. H: 71 B. H, > 71 C. H :71 D. HM7.71 b. Is it appropriate to use a normal approximation to compute a p-value in this study? A. No B. Yes, because the sample size is larger than 20 and the sample is not strongly skewed. Yos, because there are at least 10 people with jobs and at least 10 people without jobs in the sample c. Which calculator function should we use to find the p-value using a normal approximation? A. 1-Prop Z Test B. InvNorm G. Binomed D. Normalcdf d. Find the p-value. 0.71