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##### davenport stat500 week 2 quiz ch 3

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solution

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Question;?;Question 1;5 out of 5 points;Dave is a college student contemplating a;possible career option. One factor that will influence his decision is the;amount of money he is likely to make. He decides to look up the average;salary of graduates in that profession. Which information would be more;useful to him, the mean salary or the median salary. Explain.;?;Question 2;5 out of 5 points;Find the mean for the given sample. Unless;indicated otherwise, round your answer to;one more decimal place than is present in the original data values.;Last year, nine employees of an electronics company retired. Their ages at;retirement are;listed below. Find the mean retirement age.;52 50 60 68 64 50 64 58 50.;?;Question 3;5 out of 5 points;Last year, nine employees of an electronics;company retired. Their ages at retirement;are listed below. Find the median retirement age.;52 50 60 68 64 50 64 58 50.;?;Question 4;5 out of 5 points;Find the mode for the given sample data. Last;year, nine employees of an electronics company retired. Their ages at;retirement are listed below;52 50 60 68 64 50 64 58 50.;?;Question 5;5 out of 5 points;Find the variance for the given data. Round your;answer to one more decimal place than;the original data. Jeanne is currently taking college zoology. The instructor;often gives quizzes. On the past five quizzes, Jeanned got the following;scores;18 16 3 1 20;?;Question 6;5 out of 5 points;Use the empirical rule to solve the problem.;At one college, GPA's are normally distributed with a mean of 2.6 and a;standard deviation of 0.4. What percentage of students at the college;level have a GPA between 2.2 and 3?;?;Question 7;5 out of 5 points;Use the empirical rule to solve the problem.;The systolic blood pressure of 18-year-old women is normally distributed with;a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of;18-year-old women have a systolic blood pressure between 96mmHg and 144mmHg?;?;Question 8;5 out of 5 points;Find the number of standard deviations from the;mean. Round your answer to the nearast two decmial places.;The annual snowfall in a town has a mean of 31 inches and a standard;deviation of 11 inches. Last year there were 66 inches of snow. How many;standard deviations from the means is that?;?;Question 9;5 out of 5 points;Find the z-score corresponding to the given value;and use the z-score to determine whether the value is unusual. Consider a;score to be unusual it its z-score is less than -2.00 or greater than 2.00.;Round the z-score to the nearest tenth, if necessary.;A weight of 99 pounds among a population having a mean weight of 162 pounds;and a standard deviation of 24.3 pounds.;?;Question 10;5 out of 5 points;Determine which score corresponds to the higher;relative position.;Which score has the highest relative position;a) a score of 51.5 on a test for which the mean x = 47 and s = 9;b) a score of 5.9 on test for which the mean x = 4.2 and s = 1.2, or;c) a score of 460.8 on a test for which the mean x = 444 and s = 42?;?;Question 11;0 out of 5 points;Suppose that all values in a data set are;converted to z-scores. Which of the following statements below is true?;?;Question 12;5 out of 5 points;Find the percentile for the data value = 6.;Data set: 4 12 9 6 4 4 12 6 4 12 2 12 15 5 9 4 12 9 6 12

Paper#62375 | Written in 18-Jul-2015

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