Exam 3: Numerical Descriptive Measures

You were told that the quartiles of female students' weight at a major university are 95 lbs., 125 lbs., and 138 lbs...What percentage of the students weigh between 95 and 138 lbs...?

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, the arithmetic mean of the number of vitamin supplements sold in this sample is ________.

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, the interquartile range of the number of vitamin supplements sold in this sample is ________.

Which of the following statements about the median is not true?

The smaller the spread of scores around the arithmetic mean,

SCENARIO 3-13 Energy drink consumption has continued to gain in popularity since the 1997 debut of Red Bull, the current leader in the energy drink market.Given below are the exam scores and the number of 12-ounce energy drinks consumed within a week prior to the exam of 10 college students. -Referring to Scenario 3-13, how will you classify the linear relationship between the exam scores and the number of energy drinks consumed?

The median of the values 3.4, 4.7, 1.9, 7.6, and 6.5 is 1.9.

SCENARIO 3-8 The period from 2010 to 2013 saw a great deal of volatility in the value of stocks.The data in the following table represent the total rate of return of our companies from 2010 to 2013. -Referring to Scenario 3-8, calculate the geometric mean rate of return per year for Company C.

SCENARIO 3-4 The ordered array below represents the number of cargo manifests approved by customs inspectors of the Port of New York in a sample of 35 days: Note: For this sample, the sum of the values is 838, and the sum of the squared differences between each value and the mean is 619.89. -Referring to Scenario 3-4, the first quartile of the customs data is ________.

SCENARIO 3-1 Health care issues are receiving much attention in both academic and political arenas.A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid.The ages of 25 senior citizens were as follows: -Referring to Scenario 3-1, calculate the kurtosis statistic for the age of the senior citizens accurate to two decimal places.

SCENARIO 3-12 Given below are the rating and performance scores of 15 laptop computers. -Referring to Scenario 3-12, what is the sample correlation coefficient between the performance scores and the rating?

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, the first quartile of the number of vitamin supplements sold in this sample is ________.

SCENARIO 3-1 Health care issues are receiving much attention in both academic and political arenas.A sociologist recently conducted a survey of citizens over 60 years of age whose net worth is too high to qualify for Medicaid.The ages of 25 senior citizens were as follows: -Referring to Scenario 3-1, determine the interquartile range of the ages of the senior citizens.

SCENARIO 3-2 The data below represent the number of grams of carbohydrates in a serving of breakfast cereal in a sample of 11 different servings. -Referring to Scenario 3-2, the coefficient of variation of the carbohydrate amounts is ________ percent.

SCENARIO 3-11 Given below are the closing prices for the Dow Jones Industrial Average (DJIA)and the Standard & Poor's (S&P)500 Index over 10-weeks sometime in the past. -Referring to Scenario 3-11, you will expect an increase in the DJIA to be associated with

SCENARIO 3-7 In a recent academic year, many public universities in the United States raised tuition and fees due to a decrease in state subsidies.The change in the cost of tuition, a shared dormitory room, and the most popular meal plan from the previous academic year for a sample of 10 public universities were as follows: $1,589, $593, $1,223, $869, $423, $1,720, $708, $1425, $922 and $308. -Referring to Scenario 3-7, what is the kurtosis statistic of the change in the cost?

SCENARIO 3-4 The ordered array below represents the number of cargo manifests approved by customs inspectors of the Port of New York in a sample of 35 days: Note: For this sample, the sum of the values is 838, and the sum of the squared differences between each value and the mean is 619.89. -Referring to Scenario 3-4, construct a boxplot of this sample.

SCENARIO 3-3 The ordered array below represents the number of vitamin supplements sold by a health food store in a sample of 16 days. Note: For this sample, the sum of the values is 448, and the sum of the squared differences between each value and the mean is 812. -Referring to Scenario 3-3, the kurtosis statistic of the number of vitamin supplements sold in this sample is ________.

You were told that the quartiles of female students' weight at a major university are 95 lbs., 125 lbs., and 138 lbs...What percentage of the students weigh more than 138 lbs...?

In right-skewed distributions, which of the following is the correct statement?