# Statistics Questions

Aug 7th, 2016
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1. Refer to Dale article. What was the rate of committing a type I error for the After School timeperiod?1.2%12.0%5%0%2. Refer to Montgomery article. Is how heavy a child is (as measured by BMI SD score)significantly related to his or her level of physical activity (PAL) in this study?YesNo3. Researchers risk making a type II error when:They conclude that means are differentThey conclude that means are the sameThey have too many subjects in their studyThey measure too many variables in their study4. Refer to Montgomery article. From the correlation analyses in Figure 1, how much variabilitydoes time spent sedentary account for in PAL?33%11%57%22%5. Refer to Montgomery article. In the multiple regression analyses, is sex significantly related toPAL?YesNo6. Refer to Montgomery article. If percent MVPA accounts for 4.8% of the variability in PAL,how much variation does age, sex, and BMI SD score (together) account for in PAL?11.4%12.0%14.8%6.6%7. Consider two separate groups of people who had their body fatness measured. The mean andstandard deviation for groups 1 and 2 were 37.4% 4 % and 38.2% 7%, respectively. Thespread of scores is:Greater in group 1Greater in group 2The same in both groupsToo low8. Refer to Montgomery article. Which variable is inversely related to PAL?Time spent sedentaryTime spent in moderate activityAgeNone are inversely related9. If you wanted to determine whether the number of hours spent in class on

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