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##### Stats Quiz Paper

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solution

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Question;Quiz 1;Refer tothe following time plotthat shows the number of breeding bald;eagle pairs in the lower United States and answer the questions;1-2.;1.For which year is the numberpairs of;bald eagles is lowest according to the above plot?;2.Write;the approximate number of pairs of bald eagles in the year;2000.;Refer tothe following displayfor the questions 3-4;3.The;total revenue receivedaccording to the above display is;approximately;4.The;percentage of revenue contributed by;the state is approximately;5.Approximately;what percentage of the expenses is in the area of operations and maintenance?;Refer tothe following stem;plot for the questions 6-10;Thestemplotdisplays;thenumberofhoursthata sample;of;15studentsspentstudyingforacalculusfinalexam;0*9;1*;1*2333;1*45;1*6;1*8899;2* 0;2 *2;2*4;6.What is the mean of this;data?;7.What is the median of this data?;8.What is the first;quartile of this data?;9.What is the third;quartile of this data?;10. What;is the inter quartile range of this data?;11. It is discovered that;24 hours was a typographical error;for 42 hours. How will thiserror;change the answer for mean in the;question;#?;12. It is discovered that;24 hours was a typographical error;for 42 hours. How will thiserror;change the answer for median in the question;#7?;Use the following histogram for answering questions 13-16;The histogram;refers to the family incomes of 100 families in a certain county;13. Fill in the following table based on the;information fromthe above histogram.;Class (1000s of $$);MIDPOINT;Frequency;0?income<50;50;?income<100;100;?income<150;150;?income<200;200;?income<250;250;?income<300;300;?income<350;350;?income<400;400;?income<450;450;?income<500;500;?income<550;550;?income<600;14. Write;the % families with income less than;$50000;15. Write an approximate;value of the mean for the data represented by this histogram.;16. Write;the class that contains the median;value for this data.;Forthequestions17?19usethefollowingsample;dataforthetimethatittookmembersofasearch;committeetogothrough;6applications,thetimeis inminutes.;12,18,23,27,28,30;17.Findthemean xofthisdata.;18.Fillthefollowingtable;x;x-x;(x-x)2;12;18;23;27;28;30;19.Findthestandarddeviationsofthisdata.;20. A bag;of candies contains 20 candies, 8 of which are red, 6 blue;3 yellow, and 3;green. A candy is randomly drawn. Writethe;probability that this candy will be red.;21. Refer tothe following table that shows the gender;of faculty members and their;discipline areas in a certain college and answer the;questions22-25;Male;Female;STEM;78;42;HUMANITIES;65;70;BUSINESS;59;21;A faculty member is selectedat;random.;22. Find the probability;that the randomly chosen faculty;member is a male.;23. Find the probability;that the randomly chosen faculty;member is a male given that the choice is from Humanities.;24. Find the probability;that the randomly chosen faculty;member is a male and teaches business.;25. Find;the probability that the faculty;member teaches business.;26. Two fair dice (one;yellow and the green) are rolled.;Find the probability that the green die will have six dots facing up given that;the yellow die has six dots facing up.;27. Are the event sixdots facing up on the yellowdie and the event six dots facing up on the;green die independent?;Use the following box plot for the questions 28-30. The box plot refers to;a sample of average monthly temperatures in degrees;Fahrenheit for the cities ofSan Diego;and Minneapolis.;28. Which city has a;greater variability in average;monthly temperatures?;29. Which city has the greater percentage of months;with temperatures over 55 degrees F?;30. Write;the medians of the two box plots.

Paper#62077 | Written in 18-Jul-2015

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