The correlation between the number of visitors to the state of Florida and the number of shark attacks since 1990 is 0.946. Should the number of visitors to Florida be reduced in an attempt to reduce shark attacks? Explain your reasoning.

Find the critical F-value for a right-tailed test with $\alpha$=0.05, degrees of freedom in the numerator=8, and degrees of freedom in the denominator=9.

A nutritionist was interested in developing a model that describes the relation between the amount of fat (in grams) in cheeseburgers at fast-food restaurants and the number of calories. She obtains the following data from the websites of the companies.

$$\begin{matrix} \text{Sandwich (Restaurant)} & \text{Fat Content (g)} & \text{Calories}\\ \text{Quarter-pound Single with Cheese (Wendy's)} & \text{20} & \text{430}\\ \text{Whataburger (Whataburger)} & \text{39} & \text{750}\\ \text{Cheeseburger (in-n-Out)} & \text{27} & \text{480}\\ \text{Big Mac (McDonald's)} & \text{29} & \text{540}\\ \text{Quarter-pounder with cheese (McDonald's)} & \text{16} & \text{510}\\ \text{Whopper with cheese (Burger King)} & \text{47} & \text{760}\\ \text{Jumbo Jack (Jack in the Box)} & \text{35} & \text{690}\\ \text{Double Steakburger with cheese (Steak Shake)} & \text{38} & \text{632}\\ \end{matrix}$$

The researcher wants to use fat content to predict calories. Which is the explanatory variable?

Match the linear correlation coefficient r=0.946 to the scatter diagram. The scales on the x - and y-axes are the same for the given diagram.

determine the null and alternative hypotheses.

Among all credit cards issued, the proportion of cards that result in default was 0.13 in 2010. A credit analyst with Visa believes this proportion is different today.

Determine the level of measurement of each variable. Marital status

Determine the level of measurement of each variable. Number of siblings

A license plate is designed so that the first two characters are letters and the last four characters are digits (0 through 9). How many different license plates can be formed assuming that letters and numbers can be used more than once?

In sports betting, Las Vegas sports books establish winning margins for a team that is favored to win a game. An individual can place a wager on the game and will win if the team bet upon wins after accounting for the spread. For example, if Team A is favored by 5 points, and wins the game by 7 points, then a bet on Team A is a winning bet. However, if Team A wins the game by only 3 points, then a bet on Team A is a losing bet. In games where a team is favored by 12 or fewer points, the margin of victory for the favored team relative to the spread is approximately normally distributed with a mean of 0 points and a standard deviation of 10.9 points.

Explain the meaning of "the margin of victory relative to the spread has a mean of O points. "Does this imply that the spreads are accurate for games in which a team is favored by 12 or fewer points?

Let the sample space be S={red, green, blue, orange, yellow}. Suppose that the outcomes are equally likely. Compute the probability of the event: E={yellow}

determine the null and alternative hypotheses.

According to creditcard.com, the mean outstanding credit-card debt of college undergraduates was $3173 in 2010. A researcher believes that this amount has decreased since then.

Let the sample space be S={red, green, blue, orange, yellow}. Suppose that the outcomes are equally likely. Compute the probability of the event: F={green or orange}

Classify the variable as qualitative or quantitative. If the variable is quantitative, state whether it is discrete or continuous. Weight in carats of an uncut diamond

Suppose that P(E)=0.8, P(F)=0.5, and P(E and F)=0.24. Are events E and F independent? Why?