The data represents the costs of nine compact refrigerators rated very good or excellent by Consumer Reports on their website.

CheemnCatelvew
2020-10-28
Answered

Find the mean for the data.

The data represents the costs of nine compact refrigerators rated very good or excellent by Consumer Reports on their website.

The data represents the costs of nine compact refrigerators rated very good or excellent by Consumer Reports on their website.

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Mitchel Aguirre

Answered 2020-10-29
Author has **94** answers

Calculation:

The sum of all the entries divided by the total number of entries is known mean.

The formula for mean is,

$\stackrel{\u2015}{x}=\frac{\sum x}{n}$

Substitute the values and nas 9 in the formula,

$\stackrel{\u2015}{x}=\frac{150+150+160+180+150+140+120+130+120}{9}$

$=\frac{1300}{9}=144.444$

Thus, the mean cost of compact refrigerators is$\mathrm{\$}144.44$ ,

The sum of all the entries divided by the total number of entries is known mean.

The formula for mean is,

Substitute the values and nas 9 in the formula,

Thus, the mean cost of compact refrigerators is

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$\begin{array}{|ccc|}\hline \text{Production line}& \text{Observed}& \text{Expected}\\ \text{A}& 250& 250\\ \text{B}& 200& 250\\ \text{C}& {300}^{2}50\\ \text{Total}& 750& 750\\ \hline\end{array}$

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