Exam 3: Numerical Descriptive Measures

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,you will expect a decrease in the amount of energy drink consumed within the week prior to the exam to be associated with

You were told that the 1^st,2^nd and 3^rd 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...?

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 mean and median change in the cost?

SCENARIO 3-6 The rate of return of an Internet Service Provider over a 10-year period are: 10.25%,12.64%,8.37%,9.29%,6.23%,42.53%,29.23%,15.25%,21.52%,-2.35%. -Referring to Scenario 3-6,compute the geometric mean rate of return per year for the first three years.

SCENARIO 3-5 The rate of return of a Fortune 500 company over the past 15 years are: 3.17%, 4.43%, 5.93%, 5.43%,7.29%, 8.21%, 6.23%, 5.23%, 4.34%, 6.68%, 7.14%, -5.56%, -5.23%, -5.73%, -10.34% -Referring to Scenario 3-5,compute the geometric mean rate of return per year for the first four years.

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,does the distribution of the sample appear to be leptokurtic or platykurtic?

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 A.

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 standard deviation of the change in the cost?

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,what is the sample correlation coefficient between the DJIA and the S&P 500 index?

SCENARIO 3-5 The rate of return of a Fortune 500 company over the past 15 years are: 3.17%, 4.43%, 5.93%, 5.43%,7.29%, 8.21%, 6.23%, 5.23%, 4.34%, 6.68%, 7.14%, -5.56%, -5.23%, -5.73%, -10.34% -Referring to Scenario 3-4,the range of the customs data 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. 19, 19, 20, 20, 22, 23, 25, 26, 27, 30, 33, 34, 35, 36, 38, 41 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 3-8 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 D.

According to the Chebyshev rule,at least 93.75% of all observations in any data set are contained within how many standard deviations around the mean?

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 arithmetic mean age of the senior citizens to the nearest hundredth of a year.

The coefficient of variation measures variability in a data set relative to the size of the arithmetic mean.

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 interquartile range of the change in the cost?

In general,which of the following descriptive summary measures cannot be easily approximated from a boxplot?

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. 19, 19, 20, 20, 22, 23, 25, 26, 27, 30, 33, 34, 35, 36, 38, 41 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 five-number summary of the data in this sample consists of _____,_____,_____,_____,_____.

The line drawn within the box of the boxplot always represents the median.

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,are the data skewed? If so,how?