Susan keeps track of the number of tickets sold for each play presented at the community theater. Within how many standard deviations of the mean do all the values fall?

135, 71, 69, 80, 158, 152, 161, 96, 122, 118, 87, 85

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Question

Susan keeps track of the number of tickets sold for each play presented at the community theater. Within how many standard deviations of the mean do all the values fall?

135, 71, 69, 80, 158, 152, 161, 96, 122, 118, 87, 85

    3
    4
    5
    2

anonymous · Answer

first you have to find the mean of this distribution. 

mean = (sum of all the numbers)/(how many numbers were in the sum)

anonymous · Answer

12/1334

anonymous · Answer

(135+ 71+ 69+ 80+ 158+ 152+ 161+ 96+ 122+ 118+ 87+ 85)/12

anonymous · Answer

that all adds up to 1334

anonymous · Answer

ok, so now find the furthest outliers from the mean.  

mean = 111.166666667

anonymous · Answer

im confused