LINK TO TEXT LINK TO TEXT The analysis you conducted in parts (a) is “wrong” sin
ID: 3353812 • Letter: L
Question
LINK TO TEXT
LINK TO TEXT
The analysis you conducted in parts (a) is “wrong” since the data are paired. What do your results suggest about the effectiveness of pairing in this study?
How many calories do you think you burn or expend with 60 minutes of walking on the treadmill? An article that appeared in the American Journal of Men’s Health (2010) presented the results of a study conducted by researchers Harris and George, whose objective was to evaluate how accurately men can estimate their energy expenditure (EE) as measured in kilocalories (kcal). 100 normal-weight and overweight male participants, ages 21–45 years, were recruited from a large, urban university in South Florida. During one session, each participant was made to walk for 60 minutes on a treadmill, and their actual EE was calculated. After they had completed the task, each participant was asked to estimate the number of calories they burned during the task. Here are some summary statistics.
Sample
size Sample
average (kcal) Sample
SD (kcal) Estimated 100 xe = 370 se = 455.1 Actual 100 xa = 244 sa = 40.2 Difference =
Estimated – Actual 100 xd = 126 sd = 354.2
Explanation / Answer
Paired T-Test and CI
N Mean StDev SE Mean
Difference 100 126.0 354.2 35.4
95% CI for mean difference: (55.7, 196.3)
T-Test of mean difference = 0 (vs ? 0): T-Value = 3.56 P-Value = 0.001
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.