Elementary Statistics REVIEW EXAM 2

# Elementary Statistics REVIEW EXAM 2 - Elementary Statistics...

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Elementary Statistics Review Problems for Exam 2 (Please show work) Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve the problem. Round results to the nearest hundredth. 1) The mean of a set of data is 4.68 and its standard deviation is 2.83. Find the z score for a value of 9.38. A) 1.49 B) 1.66 C) 1.96 D) 1.83 1) Determine which score corresponds to the higher relative position. 2) Which is better: a score of 82 on a test with a mean of 70 and a standard deviation of 8, or a score of 82 on a test with a mean of 75 and a standard deviation of 4? A) The second 82 B) The first 82 C) Both scores have the same relative position. 2) Find the percentile for the data point. 3) In a data set with a range of 66.5 to 121.4 and 200 observations, there are 138 data points with values less than 87.7. Find the percentile for 87.7. A) 32 B) 69 C) 424 D) 138.43 3) Find the indicated measure. 4) The weights (in pounds) of 30 newborn babies are listed below. Find Q1. 5.5 5.7 5.8 6.0 6.1 6.1 6.3 6.4 6.5 6.6 6.7 6.7 6.7 6.9 7.0 7.0 7.0 7.1 7.2 7.2 7.4 7.5 7.7 7.7 7.8 8.0 8.1 8.1 8.3 8.7 A) 5.8 B) 7.5 C) 6.3 D) 6.4 4)

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Find the indicated probability. 5) On a multiple choice test, each question has 7 possible answers. If you make a random guess on the first question, what is the probability that you are correct? A) 1 7 B) 7 C) 0 D) 1 5) Answer the question, considering an event to be "unusual" if its probability is less than or equal to 0.05. 6) Is it "unusual" to get 9 when a pair of dice is rolled? A) Yes B) No 6) Estimate the probability of the event. 7) Of 1338 people who came into a blood bank to give blood, 253 people had high blood pressure. Estimate the probability that the next person who comes in to give blood will have high blood pressure. A) 0.157 B) 0.24 C) 0.108 D) 0.189 7) Construct a boxplot for the given data. Include values of the 5-number summary in all boxplots. 8) The test scores of 32 students are listed below. Construct a boxplot for the data set. 32 37 41 44 46 48 53 55 57 57 59 63 65 66 68 69 70 71 74 74 75 77 78 79 81 82 83 86 89 92 95 99 A) B) C) D) 8) From the information provided, create the sample space of possible outcomes.

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