PROBLEM EXERCISES 11 - PROBABIL 1. Suppose a large number of people take a test, and every single student gets exactly half of the answers right. In this case, the standard deviation is.
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It is a measure of the amount of variation or dispersion of a set of values. In this case, every single student gets exactly half of the answers right. This means there is no variation or dispersion in the scores. Every student has the same score. Show more…
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The table shows the number of correct answers on a test consisting of 15 questions. The table represents correct answers for a sample of the students who took the test. Find the standard deviation based on this sample. $\begin{array}{|c|c|c|c|c|c|c|c|c|}\hline \text { Correct } & {6} & {7} & {8} & {9} & {10} & {11} & {12} & {13} & {14} & {15} \\ \hline \text { Frequency } & {2} & {1} & {3} & {3} & {5} & {8} & {8} & {5} & {4} & {1} \\ \hline\end{array}$
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Use the following information to answer the next five exercises: Suppose that a group of statistics students is divided into two groups: business majors and non-business majors. There are 16 business majors in the group and seven non-business majors in the group. A random sample of nine students is taken. We are interested in the number of business majors in the sample. Find the standard deviation.
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