The Sample Standard Deviations for X and Y Are 10

question 119

Multiple Choice

The sample standard deviations for x and y are 10 and 15, respectively. The covariance between x and y is −120. The correlation coefficient between x and y is ________.

• A) −0.8
• B) −0.5
• C) 0.5
• D) 0.8

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Definitions:

Consumer Ratings

Evaluations or assessments of products, services, or companies based on consumers' experiences, preferences, or satisfaction.

Taste

Taste is one of the five senses; it is the sensation produced when a substance in the mouth reacts chemically with taste receptor cells located on taste buds.

Formulas

Standardized mathematical expressions that represent relationships among variables or specify how to calculate a specific quantity.

Kruskal-Wallis Test

The Kruskal-Wallis test is a nonparametric statistical test used to compare three or more independent groups to determine if there are significant differences between their medians.