i dont understand it.

Joey and Dee Dee bowled five games at the Rock 'n' Bowl Lanes. Their scores are given in the following table.Joey145172221159148Dee Dee182165187142159

(a) Find the mean score of each bowler. (Round the answer to one decimal place.)Joeyx=Dee Deex=

(b) Find the standard deviation of each bowler's scores. (Round the answer to one decimal place.)Joeys=Dee Dees=

1. The Truly Amazing Dudes are a group of comic acrobats. The weights (in pounds) of the ten acrobats are as follows.15219614413916683186157140138

(a) Find the mean and standard deviation of the weights. (Round the answers to one decimal place.)

x=

s=

(b) What percent of the data lies within one standard deviation of the mean?

%

(c) What percent of the data lies within two standard deviations of the mean? %

1. Find the mean, median, and mode of the following set of data. (Enter solutions for mode from smallest to largest. If there are any unused answer boxes, enter NONE in the last boxes.)

(a)6678912Mean Median Mode

Mode

(b)66789102Mean Median Mode Mode