Mathematics, 04.04.2020 09:08, AdoNice
It appears that people who are mildly obese are less active than leaner people. One study looked at the average number of minutes per day that people spend standing or walking. Among mildly obese people, the mean number of minutes of daily activity (standing or walking) is approximately Normally distributed with 367 minutes and standard deviation 64minutes. The mean number of minutes of daily activity for lean people is approximately Normally distributed with 525 minutes and standard deviation 110 minutes. A researcher records the minutes of activity for an SRS of 8 mildly obese people and an SRS of 8 lean people.
(a) What is the probability that the mean number of minutes of daily activity of the 8 mildly obese people exceeds 400 minutes? (Enter your answer rounded to four decimal places.)
(b) What is the probability that the mean number of minutes of daily activity of the 8 lean people exceeds 400 minutes? (Enter your answer rounded to four decimal places.)
Answers: 3
Mathematics, 21.06.2019 18:20, genyjoannerubiera
17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.
Answers: 2
It appears that people who are mildly obese are less active than leaner people. One study looked at...
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