A Survey Was Recently Conducted in Which Random Samples of Car

question 84

Multiple Choice

A survey was recently conducted in which random samples of car owners of Chrysler,GM,and Ford cars were surveyed to determine their satisfaction.Each owner was asked to rate overall satisfaction on a scale of 1 (poor) to 1000 (excellent) .The following data were recorded: If the analysts are not willing to assume that the population ratings are normally distributed and will use the Kruskal-Wallis test to determine if the three companies have different median ratings,which company has the smallest sum of ranks?

• A)Chrysler
• B)GM
• C)Ford
• D)All three are equal.

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Definitions:

Population Variance

The average of the squared differences from the Mean, describing the variation of the entire population.

Normally Distributed

Describes a bell-shaped frequency distribution that is symmetrical about the mean, indicating that data near the mean are more frequent in occurrence than data far from the mean.

Sample Size

The number of observations or data points collected in a study or used to represent a larger population.

Confidence Interval

A range of values that is likely to contain a population parameter, estimated from a sample data with a given level of confidence.