Ten Pairs of Points Yielded a Correlation Coefficient $r$ Of $0.790$ If

question 60

Multiple Choice

Ten pairs of points yielded a correlation coefficient $r$ of $0.790$ . If $\alpha = 0.05$ , which of the following statements is correct if $H _ { 0 } : \rho = 0$ ? (Do not calculate a $t$ -value.)

• A) Because 0.790 is greater than 0.602, the null hypothesis is not rejected.
• B) There is no correlation between the variables.
• C) Because 0.790 is greater than 0.632, the null hypothesis is rejected.
• D) Because 0.790 is greater than 0.632, the null hypothesis is not rejected.

Recognize the definitions and implications of specific terms related to normal distributions, such as mean, standard deviation, and variance.

Understand the concept and computation of quartiles within the context of the normal distribution.

Identify the characteristics that define a continuous random variable.

Understand the impact of standard deviation on the shape of the normal curve.

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Definitions:

Autarky

An economic policy or situation in which a country is self-sufficient and does not engage in international trade.

Cattle

Large domesticated bovines raised for their meat, milk, or hides, but in economic context, it broadly relates to agricultural commodities.

Opportunity Cost

The expense incurred by not selecting the second-best choice while deciding or preferring one option to another.

Cars

Motor vehicles with four wheels, primarily used for transporting people rather than goods.