Andy scored 156 on a standardized test that had a mean of 140 and 
. Marco scored 98 on a standardized test that had a mean of 91 and 
. Which had the better performance?
What will be an ideal response?
Andy's z-score was 1.6 and Marco's z-score was 1.75 so Marco performed better.
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Perform the indicated operation. Simplify if possible.4
+ 4
A. 8
B. 8
C. 9
D. 9
Find the indicated measure of central tendency.The speeds (in mi/h) of the cars passing a certain checkpoint are measured by radar. The results are shown below. Find the mode of the given data.42.8?41.3?42.6?40.6?40.840.8?41.3?41.1?42.8?40.642.8?41.1?40.6?40.9?41.344.9?44.9?42.6?40.3?42.8
A. 42.8, 40.6, 41.3 B. 41.57 C. 42.8 D. 41.3
Find all specified roots.Cube roots of 8
A. 2, -1 + 
i, -1 - 
i
B. 2, 1 + 
i, -1 - 
i
C. 2, -1 - 
i, 1 - 
i
D. 2, 1 + 
i, 1 - 
i
Solve the inequality and write the solution set in interval notation.1 - ex ? 0
A. (-?, 0) B. (-?, 0] C. (0, ?) D. [0, ?)