(01.05 MC) Mrs. Goodman’s physics class built different-shaped parachutes to see which shapes were more effective. The students tested the parachutes by dropping them from a height of 20 feet and timing the fall. They calculated the summary below: Mean Std Dev Min Q1 Median Q3 Max 4.6 secs 0.4 sec 2.3 secs 3.1 secs 4.2 secs 5.5 secs 6.4 secs The students want to see what happens to their times when they drop the parachutes from 32 feet. They find that the time of every drop is increased by 2 seconds. Find the new mean and standard deviation. (4 points)

(02.05 LC)  In 1995, Derek Jeter’s batting average was 0.250; in 1996, his batting average was 0.314. David Justice’s batting average in 1995 was 0.253 and was 0.321 in 1996. The team statistician claims Jeter’s overall average was better than Justice’s average. What may make this claim possible? (4 points)

(02.05 LC)  A group of researchers wants to develop an experiment to determine whether a new drug effectively treats high blood pressure. The researchers want to inject the drug in monkeys first to determine whether there are any potential serious side effects. Part A: What are some possible ethical issues to this type of testing? (5 points) Part B: While conducting the experiment, the researchers find that blood pressure levels return to normal, and they declare the drug is the cause of the change. Is this a good assumption? Explain. (5 points) (10 points)

Which of the following is considered the most common cause of hypokalemia?

(02.01 LC)  A television news report says that “74% of Americans have a Facebook account.” The poll is based on phone survey interviews with 4,650 adults randomly chosen from a numbered list of five million responses from around the United States, excluding Florida and Washington. Part A: What is the population and sample in this poll? (3 points) Part B: What type of sampling is used? (3 points) Part C: Are there any sources of bias present? Explain. (4 points) (10 points)

Which type of cells make up the biggest percentage of white blood cells (WBCs)?

(01.03 LC)  The data for numbers of times per week 20 students at Stackamole High eat vegetables are shown below: Part A: Describe the dotplot. (4 points) Part B: What, if any, are the outliers in these data? Show your work. (3 points) Part C: What is the best measure of center for these data? Explain your reasoning. (3 points) (10 points)

(01.03 MC)  The dotplot below shows the number of siblings reported by 25 students in a class. Describe the shape of the distribution. (4 points)

(01.02 LC)  The IQ of 10 adults is measured, and the results are 83, 87, 90, 92, 93, 100, 104, 111, 115, 121. Find the range of the data set. (4 points)

(03.04 MC)  Given P(X) = 0.35, P(Y) = 0.45, and P(Y|X) = 0.25, what are P(X and Y) and P(X or Y)? (5 points)