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Answers
A
B
C
D
E
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Difficulty—
Source: Manhattan Prep
The monthly sales (in thousands of $) at a certain restaurant for the past two years are given in the chart below:
\begin{array}{ccccccccccccc}
\text{Last Year:} & 9 & 9.5 & 10 & 10& 11& 11& 11& 11& 11& 12.5& 13& 13 \\
\text{This Year:} &9& X& 10& 10& 11& 11& 11& 11& 11& Y& 13& 13
\end{array}
If the standard deviation of the monthly sales is greater this year than last year, which of the following are possible values for X and Y?
A. 9 and 12.5
B. 10 and 11
C. 10 and 12.5
D. 11 and 11
E. 11 and 12.5
The OA is A
The monthly sales (in thousands of $) at a certain restaurant for the past two years are given in the chart below:
\begin{array}{ccccccccccccc}
\text{Last Year:} & 9 & 9.5 & 10 & 10& 11& 11& 11& 11& 11& 12.5& 13& 13 \\
\text{This Year:} &9& X& 10& 10& 11& 11& 11& 11& 11& Y& 13& 13
\end{array}
If the standard deviation of the monthly sales is greater this year than last year, which of the following are possible values for X and Y?
A. 9 and 12.5
B. 10 and 11
C. 10 and 12.5
D. 11 and 11
E. 11 and 12.5
The OA is A
