SKILL BUILDER 7: THE 95% RULE In Exercises 2.118 to 2.121, use the 95% rule and the fact that the summary statistics come from a dis- tribution that is symmetric and bell-shaped to find an interval that is expected to contain about 95% of the data values. 2.118 A bell-shaped distribution with mean 200 and standard deviation 25. 2.119 A bell-shaped distribution with mean 10 and standard deviation 3. 2.120 A bell-shaped distribution with mean 1000 and standard deviation 10. 2.121 A bell-shaped distribution with mean 1500 and standard deviation 300. 2.122 Estimating Summary Statistics For the data- set
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Introduction: The top of the graph, which provides a symbolic image of the average, median, and mode for a normal distribution, will possess the same score. Because the cumulative distribution graph of the normal distribution resembles a bell, it is generally referred to simply as the bell curve. When using various statistical methods data and arriving at conclusions, it is beneficial to have a symmetrical distribution. In the given scenario, we need to find the 95% of data distribution for the given normally distributed data. The mean and standard deviation were provided for finding the 95% area of the distributions.
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