Reference no: EM131014344
The prevalence of childhood obesity in industrialized nations is constantly rising. Since between 30% and 60% of obese children maintain their obesity into adulthood, there is great interest in better understanding the reasons for this rising trend. In one study, researchers looked at the relationship between a child's percent fat mass and several explanatory variables.4 These were the percent of energy intake at dinner, each parent's body mass index (BMI), an index of energy intake validity (EI/BMR), and gender. The following table summarizes the results of the multiple regression analysis:
b s(b)
Intercept 5.13 3.03
Gender (M = 0, F = 1) 4.69 0.51
Dinner (%) 0.08 0.02
EI/predicted BMR -1.90 0.65
Mother's BMI (kg/m2 ) 0.23 0.07
Father's BMI (kg/m2 ) 0.27 0.09
In addition, it is reported that R = 0.44 and F(5, 524) = 25.16.
(a) How many children were used in this study?
(b) What percent of the variation in percent fat mass is explained by these explanatory variables?
(c) Interpret the sign of each of the regression coef?cients given in the table. For EI/predicted BMR, data values ranged between 1.4 and 2.8 with a low value associated with underreporting of energy intake.
(d) Construct a 95% con?dence interval for the difference in predicted percent fat mass when energy intake at dinner differs by 5% (assume all other variables are the same).
|
What is the interest rate implicit
: A Navy petty officer needs cash and goes to a paycheck advance company for some money. He/she agrees to pay $560 in two weeks (when his/her paycheck arrives) in exchange for $500 today. What is the interest rate implicit in this loan? Hint: This is a..
|
|
How utilizing a software or hardware solution
: As our lecture states, technology can help in all departments of a company. Pick one department (i.e., Accounting, Operations, Finance, and so forth) and give a concrete example of how utilizing a software or hardware solution can improve the efficie..
|
|
State the null and alternative hypotheses
: Each of the variables in this analysis was measured by having the students complete a questionnaire. Discuss how this might affect the results. How well do you think that these results can be applied to other populations of high school students?
|
|
What is sustainable growth rate and firm pays no dividend
: What is the sustainable growth rate, g*? What level of initial equity investment is required if Year 2 sales are to reach $2,500? What is the new g* if the firm pays no dividend? If the firm would like to achieve a g* of 25% with no change in dividen..
|
|
How many children were used in this study
: Interpret the sign of each of the regression coef?cients given in the table. For EI/predicted BMR, data values ranged between 1.4 and 2.8 with a low value associated with underreporting of energy intake.
|
|
What experimental question did this article raise for you
: What experimental question did this article raise for you? That is, if you were going to conduct an experiment on the topic of this article using it as background information, what question would you want to explore? Briefly describe how you would..
|
|
Identical in all respects except capital structure
: Consider two firms A and B that are identical in all respects except capital structure. Firm A has $160 million in equity outstanding and $40 million in bonds outstanding. Suppose an investor has an $8 million investment in the stock of firm A. What ..
|
|
Find the volume of the solid region which lies under surface
: Find the volume of the solid region which lies under the surface z = x2y and which lies over the parallelogram with vertices (0,0), (0,1), (6,0), and (6,1).
|
|
Long-term capital gains and qualified dividends tax bracket
: After reading this chapter, it isn't surprising that you're becoming an invest- ment wizard. With your newfound expertise, you purchase 100 shares of KSU Corporation for $37 per share. In both cases, assume you are in the 25 percent federal marginal ..
|