Final Exam Review

1.      A study conducted by the Pew Research organization found that 62% of the 11,945 U.S. adults surveyed did not closely follow professional or college sports. (pewresearch.org)

The 11,945 U.S. adults represents the

• Population

• Sample

• Parameter

• Statistic

• None of the

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2.      Jason wants to study the opinions of local teachers regarding their state retirement plan. He chose to survey 20 teachers from each of the public schools in the Miami Valley.

 

Identify the sampling technique:

• Systematic

• Random

• Stratified

• Convenience

• Cluster

Bryan recorded the number of courses taken by each of his class that he taught this fall by his students. The results are in the table below, what is the median number of courses?

• 2

• 2.5

• 3

• 3.5

4.      The mean test score in Miss Smith's 4th grade science class was 67, with a standard deviation of 3. Assume the grades are normally distributed and use the Empirical Rule (68-95-99.7) to find the approximate percentage of students who scored above 70.

• 13.5%

• 2.5%

• 34%

• 97.5%

• 16%

The histogram shows the relationship between number of students and the number hours spent playing video games.

• Skewed left and the mean hours is greater than 15.54 hours.

• Skewed left and the mean hours is less than 15.54 hours.

• Skewed right and the mean hours is greater than 15.54 hours.

• Skewed right and the mean hours is less than 15.54 hours.

• Symmetric and the mean hours is 15.54 hours.

Complete the contingency table where the data represents votes on an issue. Calculate the probability that a yes voter is chosen given that a republican is chosen.

• 12/56

• 65/116

• 56/116

• 12/116

7.      Use the Standard Normal Distribution Table to find the area (probability) of the indicated shaded region.

• 0.767305

• 0.764238

• 0.235762

• 0.644309

• 0.232695

8.      The average weight of all apples at Jane’s orchard is 143.5 grams with a standard deviation of 4.4 grams. If you chose one apple at random, what's the probability that this apple will weigh less than 138 grams?

 

Assume the apple weights are normally distributed.

• 1.25

• 0.105650

• 0.894350

• 0.655422

• 0.344578

9.      The local newspaper used computer modeling to predict the probability of each possible outcome of total wins for all high school’s football teams. Since it’s behind a paywall, only a partial list of outcomes and probabilities are given. A partial probability distribution table for Tony’s team is shown below.

 

What’s the probability that his team will win at least one game this season?

• 0.137

• 0.108

• 0.245

• 0.863

• 0.755

10.      A survey of 113 Ohio baseball fans found that 49 were fans of the Reds, 63 were fans of the Guardians, and 38 were fans of both teams.

 

If one of these fans were chosen at random, what is the probability that they will be a fan of neither team?

• 0.3274

• 0.3363

• 0.3451

• 0.4336

• 0.5575