A statistics content developer at Aplia wanted to know whether study skills are

Question

A statistics content developer at Aplia wanted to know whether study skills are related to memory quality. She invited students to perform an online memory task. The students saw a list of 60 words and were then asked to recognize a list of five new words that were related to words on the original list. Students were also asked to provide their Math SAT scores. Consider the following (incomplete) grouped frequency distribution table that summarizes the data on five Math SAT score intervals collected from students who volunteered in 2009. What is the total number of scores in the data set?

Explanation / Answer

Corresponding to the class 590 - 659:

cf = 2 + 8 + 13 = 23

c% = 23/59 = 39%

Corresponding to class 660 - 729:

cf = 2 + 8 + 13 + 18 = 41

c% = 41/59 = 69%

Total number of scores in the data set = 2 + 8 + 13 + 18 + 18 = 59

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