Using the Given Frequency Distribution Table, Find the Grouped Mean

question 47

Multiple Choice

Using the given frequency distribution table, find the grouped mean. Frequency Distribution of 25 Test Scores
$$\begin{array} { | c | c | c | c | } \hline \begin{array} { c } \text { Class } \\\text { Interval }\end{array} & \text { Midpoint } & \text { lally } & \begin{array} { c } \text { Class } \\\text { Frequency }\end{array} \\\hline 45 - 49 & 47 & / & 1 \\\hline 50 - 54 & 52 & / & 1 \\\hline 55 - 59 & 57 & / / & 2 \\\hline 60 - 64 & 62 & / & 1 \\\hline 65 - 69 & 67 & / & 1 \\\hline 70 - 74 & 72 & / / & 2 \\\hline 75 - 79 & 77 & / / / & 3 \\\hline 80 - 84 & 82 & / / / & 3 \\\hline 85 - 89 & 87 & / / / & 3 \\\hline 90 - 94 & 92 & / / / / / & 5 \\\hline 95 - 99 & 97 & / / / & 3 \\\hline\end{array}$$

• A)1,975
• B)79
• C)180
• D)72

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