13. Find P(E and F)A. 2/36B. 3/36C. 4/36D. 5/36

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For questions 14-17use the following:At De Anza College, a sample of 12 students were asked how many pairs of jeans they own. The results are in the table below:Number of pairs of jeansFrequency213142538110215120114. The sample mean and sample standard deviation are:

15. A histogram of these data would be:

16. The interquartile range for these data is:

17. Find the 40th Percentile.A. 4B. 5C. 3.2D. 4.8

For questions 18-21, use the following: A family doctor is interested in the average number of hours per week her patients spend exercising. 18. The population is:

19. Let X = the number of hours per week one of her patients spends exercising. X is a:

20. The family doctor surveys 20 of her patients. She finds that the average number of hours per week these 20 patients spend exercising is 2.8. The value 2.8 hours is:

21. To do this survey, she asked the first 20 patients who came into her office on Tuesday. This type of sampling isA. StratifiedB. ClusterC. ConvenienceD. Simple Random

Winter 2011FORM J Name Last:___________________ First: __________________Exam 1: Chapters 1,2,3Class Time:________________________Directions:•Print your NAME and CLASS TIME on THIS EXAM•Print your NAME and CLASS TIME on your SCANTRON.•Write FORM J on your SCANTRON.•Each question has exactly one BEST answer. There are 21 questions.•You may write on this exam. There is no scratch paper allowed.•Each question is worth 5 points for a total of 105 points. This includes 5 bonus points!•If you have no note page, you must write NO NOTESon your SCANTRON.•Put your SCANTRON and PAGE of NOTES inside your EXAM. Before you start packing up your things, turn in your EXAM and SCANTRON. Then go back to your desk to pack up your materials. When your exam is returned, you will get back all materials you turned in.•Turn your cell phone OFF. Any noise from a cell phone will signal that your exam is over.•FAILURE TO FOLLOW ALL INSTRUCTIONS WILL COST YOU THE 5 BONUS POINTS!__________________________________________________________________________________________For questions 1-3, use the following:Twenty-five De Anza College math instructors were asked how many times per week they go to the grocery store. The partial results are given in the table below:Number of times per week gone to the grocery storeFrequencyRelative FrequencyCumulative Relative Frequency011523362TOTAL25