Forty randomly selected students were asked the number of pairs of sneakers they owned. Let X = the number of pairs of sneakers owned. The results are as follows: X Frequency Relative Frequency Cumulative Relative Frequency 1 2     2 4     3 8     4 12     5 12     6 2     Find the sample mean x. (Round your answer to two decimal places.)

College graduates in a random sample were asked the age when they earned their bachelor's degree. The data are summarized in the frequency table below. Find the mean of the sample. Submit your answer as a decimal value rounded to the nearest tenth. Frequency table: Count of the age when students graduated with a bachelor's degree Age 21 22 23 24 25 26 Frequency 1 3 4 2 O 9

Which of the following  percentiles represents the median of a data set? Select one: a. 100th b. 25th c. 50th d. 75th

The weights, in pounds, of packages on a delivery truck are shown in the stem-and-leaf plot. Find the mean, the median, and the mode of the data, if possible. If any measure cannot be found or does not represent the center of the data, explain why. ... OA. The mean is 0 36 1 0347 2 2333669 3 045556789 4 01346 5 5 Key: 30=30 Find the mean. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. (Round to one decimal place as needed.) OB. The mean cannot be calculated because the sample size is too small. OC. The mean cannot be calculated because the data are at the nominal level of measurement. D. The mean cannot be calculated because there is an even number of data entries.