Question

Find the mean, median, and mode of the data set. Round to the nearest tenth.
15, 13, 9, 9, 7, 1, 11, 10, 13, 1, 13

a. mean=9.3, median=8, mode=13
b. mean=8.5, median=10, mode=13
c. mean=9.3, median=10, mode=13
d. mean=8.5, median=10, mode=8

Answer 1

To find the mean, add up all the numbers in the data set and divide by the total number of numbers.
Mean = (15+13+9+9+7+1+11+10+13+1+13) / 11 = 101 / 11 ≈ 9.2

To find the median, first put the numbers in order from least to greatest. 1, 1, 7, 9, 9, 10, 11, 13, 13, 13, 15. Since there are 11 numbers, the median is the middle number, which is 10.

To find the mode, look for the number that appears most frequently. In this data set, the number 13 appears three times, which makes it the mode.

Therefore, the correct answer is c. mean=9.3, median=10, mode=13