The Citizens Banking Company is studying the number of times the ATM at an office complex is used per day. The following table shows the last 15 days use of the ATM.
83 64 84 76 84 54 75 59 70 61 63 80 84 73 68
a. What is the mean number of times the ATM was used per day? ________
b. What is the median number of days the ATM was used each day? ______
c. What is the standard deviation for the sample data (round to the nearest whole number)? _______
In problem above:
a. What value sits at 2 standard deviations from the mean?________
b. What value sits at minus 3 standard deviations from the mean? ______