Quiz Two in Week Three

What test? Hours of sleep were averaged for first year and second year PA students. First=3.9, Second=4.5, std = 1.8

In hypothesis testing, another name for the significance level (alpha) is:

The confidence interval with n=50 students is narrow (mean = 40 CI = 35-45). If I studied 20 students, the CI would...

To analyze differences within a group of the pre and post intervention mean, what statistical test is most appropriate?

In statistics, what is the definition of power?

The intervention group walked=300.0 ft and the control group walked=295.5 ft (p=0.42). In a 2-tailed test α = 0.05)...

True or False: The significance level of a test is the probability of rejecting a true null hypothesis?

Authors note: “To show a change in happy score of 15 points required 25 subjects using a 1-sided, alpha=0.05, 80% power.

To analyze if the mean difference between group one and group two (independent groups) are different we use...

What test? Outcome of interest = oxygen uptake (in ml/kg/min) Independent variables=age, gender, and BMI?