designed to despense

[sanju09]

7.51 8.22 7.86 8.36

8.09 7.83 8.30 8.01

7.73 8.25 7.96 8.53

A vending machine is designed to despense 8 ounces of coffee into a cup. After a test that recorded the number of ounces of coffee in each of 1,000 cups dispensed by the vending machine, the 12 listed amounts, in ounces, were selected from the data. If the 1,000 recorded amounts have a mean of 8.1 ounces and a standard standard deviation of 0.3 ounce, how many of the 12 listed amounts are within 1.5 standard deviations of the mean?
A. 7
B. 9
C. 10
D. 11
E. 12


OA D

[pjasak]

Can we make up our own list of the 12 amounts or is there a missing list somewhere?

Thanks

[sanju09]

Can we make up our own list of the 12 amounts or is there a missing list somewhere?

Thanks

Oh yes, this data is missing:

7.51 8.22 7.86 8.36

8.09 7.83 8.30 8.01

7.73 8.25 7.96 8.53