Do Millennials have on average a greater income than Baby Boomers? To investigate this question two SRS samples of 50 Millennials and 50 Baby Boomers were selected. In this case the null hypothesis is: 

Which correlation coefficient best matches the scatterplot shown below?

The cumulative probability function of the daily number of customers visiting a retail store during a specific time slot () is given in the table below.

The expected value and variance of the daily number of costumers visiting the store are, respectively,

Which correlation coefficient best matches the scatterplot shown below?

If the covariance between two variables is zero, they must be independent.

The cumulative probability function of the daily number of customers visiting a retail store during a specific time slot () is given in the table below.

The expected value and variance of the daily number of costumers visiting the store are, respectively,

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