Suppose That a Random Sample of 60 Observations Was Drawn

question 42

Essay

Suppose that a random sample of 60 observations was drawn from a population.After calculating the mean and standard deviation,each observation was standardized and the number of observations in each of the intervals below was counted.Can we infer at the 10% significance level that the data were drawn from a normal population?
$$\begin{array} { | l | c | } \hline \text { Intervals } & \text { Frequency } \\\hline Z \leq - 1 & \mathbf { 8 } \\- 1 < Z \leq 0 & 30 \\0 < Z \leq 1 & 17 \\Z > 1 & 5 \\\hline\end{array}$$

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Definitions:

Evaluate

To assess or calculate the value or amount of something through analysis or computation.

Six-Figure Accuracy

A level of precision in numerical calculations or measurements that is accurate to six digits.

Solve

To find an answer or solution to a mathematical problem or equation.

Simplify

The process of making something less complex or easier to understand.