The Following Data Represent the Scores of 50 Students on a Statistics

question 52

Essay

The following data represent the scores of 50 students on a statistics exam. $$\begin{array} { l l l l l l l l l l } 39 & 51 & 59 & 63 & 66 & 68 & 68 & 69 & 70 & 71 \\71 & 71 & 73 & 74 & 76 & 76 & 76 & 77 & 78 & 79 \\79 & 79 & 79 & 80 & 80 & 82 & 83 & 83 & 83 & 85 \\85 & 86 & 86 & 88 & 88 & 88 & 88 & 89 & 89 & 89 \\90 & 90 & 91 & 91 & 92 & 95 & 96 & 97 & 97 & 98\end{array}$$ a. Find the lower quartile, the upper quartile, and the median of the scores. b. Find the interquartile range of the data and use it to identify potential outliers. c. In a box plot for the data, which scores, if any, would be outside the outer fences? Which scores, if any, would be outside the inner fences but inside the outer fences?

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Definitions:

Break-Even Point

The point at which the amount of goods produced or sold matches the total costs, leading to no profit or loss.

Variable Expenses

Costs that change in proportion to the level of goods or services produced by a business.

Fixed Expenses

Costs that do not change with the level of goods or services a company produces over a short period, such as rent, salaries, and insurance.

Sales Mix

The proportion of different products or services that a company sells, impacting its overall profitability and revenue.