Individuals in Four Different Age Groups Are Asked to Rate

question 51

Multiple Choice

Individuals in four different age groups are asked to rate, on a scale of 1 to 10, three flavors of ice creams. Each group has the same number of individuals. Median ratings by the individuals are grouped by the flavor of ice cream and by age group. Which nonparametric test could be used to see if there is a difference in median ratings among the four age groups and three flavors?

• A)Wilcoxon signed-rank test
• B)Friedman test
• C)Mann-Whitney test
• D)Kruskal-Wallis test

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Definitions:

Autoregressive(2)

A type of statistical model used in time series analysis in which a variable's current value is predicted from its own previous values, using two time-lags.

Second-order Autoregressive Model

A stochastic process where the current value is based on a linear combination of the two immediately prior values plus an error term.

Average Mortgage Rate

The mean interest rate given across all mortgage loans in a given period, indicating the cost of borrowing for home loans.

Seasonal Variation

Fluctuations in data or activity that occur at regular intervals over a year due to seasonal factors.