A Major Automobile Manufacturer Claimed That the Frequencies of Repairs

question 95

Essay

A major automobile manufacturer claimed that the frequencies of repairs on all five models of its cars are the same. A sample of 200 repair services showed the following frequencies on the various makes of cars.
$\begin{array}{ll}\text { Model of Car }&\text { Frequency }\\\mathrm{A} & 32 \\\mathrm{~B} & 45 \\\mathrm{C} & 43 \\\mathrm{D} & 34 \\\mathrm{~E} & 46\end{array}$ At α = 0.05, test the manufacturer's claim.

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Definitions:

Boxplots

A graphical representation showing the distribution of numerical data through their quartiles, highlighting the median and outliers.

ANOVA Assumption

Underlying assumptions required for the validity of ANOVA, including independence, normality, and homogeneity of variance.

Coefficient of Determination

A statistic that indicates the proportion of the variance in the dependent variable that is predictable from the independent variable(s).

Battery Life

The duration for which a battery can operate before it needs recharging or replacement.