1) The Richmond Chess Club is organizing a series of games to select contenders for the national championship. The total number of points by player are normally distributed with a mean of 250 and a standard deviation of 20. To quality for the national championship a player must reach a z-score (or z-value) of 3.00 or higher. Find the maximum points a chess player needs to score to quality for the national championship?

A. 270 points

B. 310 points

C. 253 points

D. 770 points

E. 190 points

2) You believe more people shop grocery online after the COVID-19 pandemic. In 2019, on average 12% individual shop grocery online (or on average 88% of grocery shopping is at brick and mortar stores). You selected a random sample of 200 individuals last month and found that on average 23% of grocery shopping were online. What is the alternate hypothesis (H_A)?

A. H_A: P 12%

B. H_A: > 46

C. H_A: P > 12%

D. H_A: P > 23%

E. H_A: P 23%

2) In a regression model, what does the slope coefficient represent?

A. The average amount of variation in the dependent variable (Y) that is being explained by the regression.

B. It is the standard error on the independent variable (X).

C. The significance level of the independent variable (X), with less than 0.05 being considered significant.

D. The change needed in the independent variable (X) for a one-unit change in the dependent variable (Y).

E. The change in the dependent variable (Y) needed for a one-unit change in the independent variable (X).

3) A correlation (r) of -0.18 indicates a weak linear relationship between the variables.

A. True

B. False

C. The variables may not be appropriate for regression.

D. Correlations don't give this type of information

E. We don't have enough information to say