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Final_Review_with_KEY

Final_Review_with_KEY - MAT 151 Final Review Problems 1...

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MAT 151 Final Review Problems 1. Read the article excerpt below and answer the questions that follow: Harris Interactive. “ The number of ‘Cyberchondriacs’– Adults Going Online for Health Information- Has Declined . In a survey of 1,010 US adults surveyed by phone from July 8-13, 2008, about 253 report going online for healthcare information. On average, those who do look for healthcare information online 4.8 times per month. “ a. Describe the population indicated in the article. b. Describe the sample indicated in the article. c. State the numerical value (using correct notation) for the sample proportion of those who go online for healthcare information. d. State what (and using correct notation) the numerical value 4.8 represents. 2. A high school counselor selects every 100 th student’s name from the school’s database to participate in a survey regarding part-time jobs. Which kind of sampling does this represent? What type of data is collected? 3. To avoid working late, a quality control analyst simply inspects the first 100 items produced in a day by measuring the container content. Which kind of sampling does this represent? What type of data is collected? 4. Which of the two samples above is more representative of the population? Why? 5. Given that 700 people were aged between 25 and 40, using the above relative frequency histogram approximately how many had a systolic blood pressure reading between 130 and 149 inclusive?
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6. A meteorologist records the number of clear days in a given year in each of 21 different U.S. cities. The results are shown below. 72 14 3 52 8 4 10 0 9 8 10 1 12 0 99 12 1 8 6 60 5 9 71 12 5 13 0 10 4 7 4 83 5 5 16 9 Using technology, find the mean, median, range, standard deviation and 5 Number Summary for this sample. Label you answers using proper notation. Create a frequency histogram with 6 classes. 7. a. Which measure of center best describes the population for the data set in #6? Why? b. What is the best way to describe the location and spread of the data set in #6? Why? 8. a. Find the probability that a randomly selected asthma sufferer is not a smoker. b. Given that a randomly selected asthma sufferer is a light smoker, find the probability the person is male. c. Find the probability of being a female asthma sufferer or being an asthma sufferer who is a heavy smoker.
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