Reference no: EM131713812

Question: Mail. Here are the number of pieces of mail received at a school office for 36 days.

123       70        90

 80        78        72

 52       103      138

112       92        93

118      118      106

 95      131        59

151     115        97

100     128       130

 66      135       76

143     100       88

110      75       60

115     105      85

a) Plot these data.

b) Find appropriate summary statistics.

c) Write a brief description of the school's mail deliveries.

d) What percent of the days actually lie within one standard deviation of the mean? Comment.