Mathematics, 21.01.2021 22:20 Quakersoatmeal9
Computing variance by hand is a tedious process. To compute the sample standard deviation, we can use R using the command (sd(name of data))^2. But there is no direct command to compute the population variance. For a population of size n, give the correction factor by which you must multiply the final answer from R to convert it from a sample variance to a population variance. (Hint: Review the population variance formula and the sample variance formula.)
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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 mean 376 minutes and standard deviation 64 minutes. the mean number of minutes of daily activity for lean people is approximately normally distributed with mean 528 minutes and standard deviation 107 minutes. a researcher records the minutes of activity for an srs of 7 mildly obese people and an srs of 7 lean people. use z-scores rounded to two decimal places to answer the following: what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 mildly obese people exceeds 420 minutes? what is the probability (image for it appears that people who are mildly obese are less active than leaner people. one study looked at the averag0.0001) that the mean number of minutes of daily activity of the 6 lean people exceeds 420 minutes?
Answers: 1
Computing variance by hand is a tedious process. To compute the sample standard deviation, we can us...
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