samqu1 - 3. Given below are the times (in minutes) required...

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STA 2023 SAMPLE QUIZ 1 Name: SSN: For multiple choice questions, place an X next to the correct answer in the space provided. The following description applies to questions 1 and 2. According to a report in USA Today , 23% of the adults in the United States who make New Years resolutions break at least one of them within 1 week. 700 U. S. adults who had made New Years resolutions were interviewed in the survey. 1. Which of the following is the POPULATION? (2 pts) (a) the average number of resolutions made by adults in the U.S. (b) the 700 adults surveyed. (c) all adults in the U. S. who had made New Years resolutions. . (d) an indicator of whether or not each person broke at least one of their resolutions. 2. Which of the following is the VARIABLE of interest in the USA Today report? (2 pts) (a) the average number of resolutions made by adults in the U.S. (b) the 700 adults surveyed. (c) all adults in the U. S. who had made New Years resolutions. . (d) an indicator of whether or not the person broke at least one of his/her resolutions.
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Unformatted text preview: 3. Given below are the times (in minutes) required by a sample of 5 children to learn a prescribed motor skill. 3 , 8 , 10 , 4 , 5 (a) Find the median. SHOW YOUR WORK! (2 pts) (b) Find the variance. SHOW YOUR WORK! (5 pts) 1 4. When a machine used to ll breakfast cereal boxes is operating correctly, the amount of cereal dis-pensed has an approximately bell-shaped distribution with mean 12 ounces and standard deviation 0.2 ounces. If the machine is working correctly, what can you say about the percent of boxes into which the machine dispenses more than 12.4 ounces? SHOW YOUR WORK! (6 pts) 5. Suppose that a data set has a distribution that is skewed left. (a) Draw a rough sketch indicating the shape of this distribution. (1 pts) (b) Which of the following is most likely to be true for a distribution that is skewed left? (2 pts) (i) The mean and the median are equal. (ii) The mean is larger than the median. (iii) The mean is smaller than the median. 2...
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samqu1 - 3. Given below are the times (in minutes) required...

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