Statistics show that the average person sleeps 8 hours per day. A researcher thinks that university students sleep less than the hypothesized population mean of 8 hours. To test her hypothesis, she surveys 20 university students to see how many hours they sleep.
Reported hours of sleep per night: 5, 8, 7, 8, 6, 6, 4, 8, 7, 10, 8, 7, 9, 5, 8, 8, 6, 9, 6, 8
Generate your null and alternative hypotheses and write them below. Test for significant difference in sleep duration using the One-Sample T-Test. Use a two-tailed test at the 0.05 level of significance.
H0: The mean hours of sleep for university students is equal to 8.
H1: The mean hours of sleep for university students is less than 8.
Mean hours of sleep (student sample): _________
Std. deviation: ____________
T value: _____________
Degrees of freedom: _____________
Level of significance (2-tailed): _____________
Size of the mean difference:
Decision regarding H0: (FAIL TO REJECT or REJECT)
What is your conclusion (Do university students sleep less than the hypothesized population mean of 8 hours?)