Obesity is a growing problem around the world. Surprisingly, some people don\'t

Question

Obesity is a growing problem around the world. Surprisingly, some people don't gain weight even when they overeat. Perhaps fidgeting and other "nonexercise activity" (NEA) explains why—some people may spontaneously increase nonexercise activity when fed more. Researchers deliberately overfed 16 healthy young adult volunteers for 8 weeks. They measured fat gain (in kilograms, kg) and, as an explanatory variable, change in energy use (in kilocalories, or Calories, Cal) from activity other than deliberate exercise—fidgeting, daily living, and the like.

Here is part of the Minitab output for regressing fat gain on NEA change in this study, along with prediction for a person adding 400 NEA calories:

(a) What is the regression standard error for these data?

0.00070

.3036    

0.7399

(b) Confidence intervals and tests for these data use the t distribution with what degrees of freedom?  

Predictor Coef SE Coef T P Constant 3.5051 0.3036 11.54 0.000 NEA change 0.0034415 0.0007414 4.64 0.000      S = 0.739853      R-Sq = 60.6%      R-Sq(adj) = 57.8%

Explanation / Answer

(a) The regression standard error for these data is 0.7399                 since S = 0.739853 in the table

correct answer; option (C)

(b) The degrees of freedom for confidence interval and t - test is n - 2 = 16 - 2 = 14

Related Questions

Navigate

• Browse (All)
• Browse O
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.