If the Standard Deviation of X Is 18,the Covariance of X

question 172

True/False

If the standard deviation of x is 18,the covariance of x and y is 120,the coefficient r = 0.90,then the standard deviation of y is 54.87.

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Definitions:

Impartiality

The principle of being fair and unbiased, making decisions and judgements based on objective criteria rather than personal feelings or interests.

Self-interest

The focus on one's own benefits and well-being, often seen as a driving force behind decision-making.

Binomial Random Variable

A type of random variable that represents the number of successes in a fixed number of binary experiments.

Binomial Experiment

A statistical experiment that fits the binomial distribution; characterized by fixed number of trials, two possible outcomes per trial, independent trials, and constant probability of success.