In: Statistics and Probability
In this problem, we explore the effect on the mean, median, and mode of multiplying each data value by the same number. Consider the following data set.
4, 4, 5, 8, 12
(a) Compute the mode, median, and mean.
mode | |
median | |
mean |
(b) Multiply each data value by 6. Compute the mode, median, and
mean.
mode | |
median | |
mean |
(c) Compare the results of parts (a) and (b). In general, how do
you think the mode, median, and mean are affected when each data
value in a set is multiplied by the same constant?
Multiplying each data value by the same constant c results in the mode, median, and mean increasing by a factor of c.Multiplying each data value by the same constant c results in the mode, median, and mean remaining the same. Multiplying each data value by the same constant c results in the mode, median, and mean decreasing by a factor of c.There is no distinct pattern when each data value is multiplied by the same constant.
(d) Suppose you have information about average heights of a random
sample of airline passengers. The mode is 68inches, the median is
70 inches, and the mean is 70 inches. To convert the data into
centimeters, multiply each data value by 2.54. What are the values
of the mode, median, and mean in centimeters? (Enter your answers
to two decimal places.)
mode | cm |
median | cm |
mean | cm |