Here Are Some Summary Statistics for All of the Runners

Multiple Choice

Here are some summary statistics for all of the runners in a local 12 kilometre race: slowest time = 129 minutes,mean = 79 minutes,median = 79 minutes,range = 99 minutes,IQR = 64,Q1 = 32,standard deviation = 11 minutes.Suppose last year's race results were better by 8%.Find last year's mean and standard deviation.Express your answer in exact decimals.

A) Mean: 6.32 minutes,SD: 0.88 minutes
B) Mean: 85.32 minutes,SD: 11 minutes
C) Mean: 85.32 minutes,SD: 11.88 minutes
D) Mean: 72.68 minutes,SD: 10.12 minutes
E) Mean: 72.68 minutes,SD: 11 minutes