Suppose we measure how much sleep students in first and second year at UVic get per...
Suppose we measure how much sleep students in first and second year at UVic get per night. A sample of 25 first year students slept an average of 8.4 hours per night with a standard deviation of 1.1 hours. A sample of 18 second year students slept an average of 7.6 hours per night with a standard deviation of 2.3 hours. Suppose we want to test if first year students sleep more than second year students. Assuming the number of...
Suppose we measure how much sleep students in first and second year at UVic get per night. A sample of 21 first year students slept an average of 7.9 hours per night with a standard deviation of 1.3 hours. A sample of 16 second year students slept an average of 6.8 hours per night with a standard deviation of 2.1 hours. Suppose we want to test if first year students sleep more than second year students. Assuming the number of...
Suppose we measure how much sleep students in first and second year at UVic get per night. A sample of 21 first year students slept an average of 7.9 hours per night with a standard deviation of 1.3 hours. A sample of 16 second year students slept an average of 6.8 hours per night with a standard deviation of 2.1 hours. Suppose we want to test if first year students sleep more than second year students. Assuming the number of...
A scientific study was conducted to determine the hours of sleep that college students get per night. The college students surveyed slept an average of 7.8 hours per night. The margin of error of the survey was 0.5 hours. Construct a confidence interval for the average hours of sleep per night that college students get.
Students who get more sleep get better grades. You want to estimate the hours of sleep per night that a college student gets. You select 29 students; on average they slept 6.2 hours with a standard deviation of 1.8 hours. The standard error is 0.334. In order to be 90% confident of an estimate of the population mean, what is the critical value? A- 1.640 B- 1.960 C- 1.699 D- 1.701 E- 2.064
The distribution of hours of sleep per week night, among college students, is found to be Normally distributed, with a mean of 6.5 hours and a standard deviation of 1 hour. What range contains the middle 95% of hours slept per week night by college students (a) 5.5 and 7.5 hours per week night (b) 4.5 and 7.5 hours per week night (c) 4.5 and 8.5 hours per week night 3.19
The number of hours of sleep each student gets per night is approximately normally distributed with mean of 7 hours and standard deviation of 1.25 hours. (c) Cognitive functioning drops off dramatically without enough sleep. Suppose that Health Services wants to help the students who sleep the least. Due to budget constraints, they will focus their efforts on students who are in the bottom 5% of hours slept. At what number of hours should they focus their efforts?
Suppose that we are interested in determining whether cats tend to sleep more than 12 hours a day on average let denote the true number of hours that cats sleep each night. You observe 32 cats for a day and record the number of hours that each of the cats slept. The average of your samples 13.1 hours and the sample standard deviation of your sample is 2.8 hours. Your confidence intervalis (a) Construct a 99% confidence interval for hours...
Total sleep time of college students. A recent survey describes the distribution of total sleep time among college students as approximately Normal with a mean of 6.78 hours and standard deviation of 1.24 hours.3 Suppose that we select a college student at random and obtain his or her sleep time. This result is a random variable X because, prior to the random sampling, we don't know the sleep time. We do know, however, that in repeated sampling, X will have...
A professor at a university wants to estimate the average number of hours of sleep students get during exam week. On the first day of exams, she asked 27 students how many hours they had slept the night before. The average of the sample was 3.79 with a standard deviation of 1.224. When estimating the average amount of sleep with a 99% confidence interval, what is the margin of error? 1) 0.3549 2) 0.6546 3) 0.5839 4) 0.2356 5) 0.6527