The Following Data Are Believed to Have Come from a Normal

question 40

Essay

The following data are believed to have come from a normal probability distribution. $$\begin{array} { l l l l l l l l l } 26 & 21 & 25 & 20 & 21 & 29 & 26 & 23 & 22 \\24 & 30 & 23 & 32 & 26 & 24 & 32 & 16 & 36 \\21 & 31 & 26 & 23 & 32 & 35 & 40 & 30 & 14 \\46 & 27 & 33 & 25 & 27 & 21 & 26 & 18 & 29\end{array}$$ The mean of this sample equals 26.80, and the standard deviation equals 6.378. Use the goodness-of-fit test at the 5% significance level to test whether the data indeed come from a normal distribution.

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Definitions:

Credit Terms

The agreed upon conditions between a buyer and a seller regarding the amount and timing of payment for goods or services.

Periodic Inventory System

An inventory system where stock levels and cost of goods sold are calculated at the end of an accounting period, rather than updated continuously.

Net Method

An accounting method that records purchases after deducting any available discounts, directly showing the net purchase cost.

Credit Terms

Conditions under which credit will be extended to a customer, including repayment timeframe and interest rate.