8. find the mean, median, mode and range of the data set after you perform the given operation on each data view. 13, 17, 15, 18, 21, 13, 20; add 3.7

a) mean: 20.4, median: 20.7, mode: 16.7, range: 8
b) mean: 16.7, median: 20.7, mode: 18.7, range: 8
c) mean: 21.7, median: 14.7, mode: 16.7, range: 8
d) mean: 16.7, median: 21.7, mode: 16.7, range: 8

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Express the following as a function of a single angle. cos(60) cos(-20) - sin(60) sin(-20)

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?