Homework 3: Inferential Statistics All of this homework MUST be typed Read this
ID: 211459 • Letter: H
Question
Homework 3: Inferential Statistics All of this homework MUST be typed Read this quote, and then answer A, B and C about this actual study. "The Surgeon General's Report on Physical Activity and Health brings together overwhelming evidence linking physical activity (PA) to numerous health benefits and provides a solid foundation upon which to promote regular PA for citizens of all ages. Accordingly, the leisure time activity patterns of adolescent boys and girls [in lowa] were studied in order to gain a better understanding of the habitual PA patterns in this population. Data were collected from 6,025 children in grades 4 through 12 during fall 1996 using a self-report questionnaire administered during physical education classes. Depending upon age and gender, anywhere from 5% to 15% of Iowa youth report being completely sedentary Contrary to the findings of most national-scope studies, there was little difference in the extent of participation in PA for boys and girls. Overall, approximately 58% of Iowa boys and 54% of Iowa girls report participating in PA 3 or more days per week for 30 min or more per occasion, figures that are far short of the national health goal of 75% Findings also reveal that participation in leisure-time PA declines substantially with age. (Hensley and Major, ROES, March 1998, A-33) A. What is the dependent variable in this study? The dependent variable in the B. There are two independent variables in this study. Name them. The independeat study is physical activities. variables are age and gender. C. What was the authors conchusion regarding the null hypothesis for each independent variable? a Hypothesis One i. State the null hypothesis. Null hypothesis is there is no difference in the extent of participation in PA for boys and girls. i Identify the decision (accept/ireject). Reject Ho. ii. What is the basis for the decision? The basis for the decision is P value. b. Hypothesis Two i. State the null hypothesis ii Identify the decision (accept/reject). ii. What is the basis for the decision? efollowing description and then answer items A and B. Researchers are interested in determining whether there is a difference berween two exercize regimens (A and B). The researchers think that the regimens may have differential efects on a treadmili test where the participants rn to exhanstion.Explanation / Answer
The second null hypothesis can be:
Ho: The participation in leisure time physical activity remains same with advancing age.
The alternate hypothesis can be:
H1: The participation in leisure time decreases with age.
If calculated P-value comes out to be less than the tabulated value, then, the Ho will fail.
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