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1.
The following table lists the number of deaths by cause as reported by the Centers for Disease Control and Prevention on February 6, 2015 (Source: http://www.cdc.gov).
Cause of Death  Number of Deaths 
Heart disease  611,105 
Cancer  584,881 
Accidents  130,557 
Stroke  128,978 
Alzheimer’s disease  84,767 
Diabetes  75,578 
Influenza and Pneumonia  56,979 
Suicide  41,149 
 What is the variable for this data set?
 The cause of death from each disease.
 The number of deaths from each disease.
 The cause of death.
 The number of deaths.
 How many observations are in this data set?
 How many elements does this data set contain?
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2.
The following data give the results of a sample survey. The letters A,B,C
represent the three categories.
A  B  A  C  B  B  A  C  A  C 
C  C  A  B  A  C  B  C  B  B 
B  C  A  B  C  A  B  B  B  C 
 Prepare a frequency distribution table.
catagory  Frequency 
A  
B  
C 
 Calculate the relative frequencies and percentages for all categories.
Round your answers for relative frequencies to three decimal places and your answers for percentages to one decimal place.
catagory  Relative Frequency  Percentage 
A  
B  
C 
 What percentage of the elements in this sample belong to Category
B?
Round your answer to one decimal place.
___________________% of the elements in this sample belong to category B.
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the tolerance is +/2%
 Draw a bar graph for the frequency distribution.
3.
The accompanying table lists the 2010 median household incomes, rounded to the nearest dollar, for all 50 states and the District of Columbia.
State  2010 Median Household Income (dollars)  State  2010 Median Household Income (dollars)  
AL  40,976  MT  41,467  
AK  58,198  NE  52,728  
AZ  47,279  NV  51,525  
AR  38,571  NH  66,707  
CA  54,459  NJ  63,540  
CO  60,442  NM  45,098  
CT  66,452  NY  49,826  
DE  55,269  NC  43,753  
DC  55,528  ND  51,380  
FL  44,243  OH  46,093  
GA  44,108  OK  43,400  
HI  58,507  OR  50,526  
ID  47,014  PA  48,460  
IL  50,761  RI  51,914  
IN  46,322  SC  41,709  
IA  49,177  SD  45,669  
KS  46,229  TN  38,686  
KY  41,236  TX  47,464  
LA  39,443  UT  56,787  
ME  48,133  VT  55,942  
MD  64,025  VA  60,363  
MA  61,333  WA  56,253  
MI  46,441  WV  42,839  
MN  52,554  WI  50,522  
MS  37,985  WY  52,359  
MO  46,184 



Source: U.S. Census Bureau. 
 Construct a frequency distribution table using the following classes.
Median Household Income  Frequency 
37,000 to 41,999  _________________ 
42,000 to 46,999  _________________ 
47,000 to 51,999  _________________ 
52,000 to 56,999  _________________ 
57,000 to 61,999  _________________ 
62,000 to 66,999  _________________ 
 Calculate the relative frequency and percentage for each class.
Round your answers for relative frequencies to three decimal places and your answers for percentages to one decimal place.
Median Household Income  Relative Frequency  Percentage 
37,000 to 41,999  ______________  ____________ 
42,000 to 46,999  ______________  ____________ 
47,000 to 51,999  ______________  ____________ 
52,000 to 56,999  ______________  ____________ 
57,000 to 61,999  ______________  ____________ 
62,000 to 66,999  ______________  ____________ 
 Based on the frequency distribution, do the data appear to be symmetric or skewed?
The data appear to be
 symmetric
 skewed
 What percentage of these states had an estimated median household income of $42,000or more?
Round your answer to one decimal place.
____________________% of these states had an estimated median household income of $42,000 or more.
4.
Which of the following is not a characteristic of the normal distribution?
A  The two tails of the curve extend indefinitely 
B  The total area under the curve is 1.0 
C  The curve is symmetric about the mean 
D  The value of the mean is always greater than the value of the standard deviation. 
5.
The total area under a normal distribution curve to the left of the mean is always:
A.Greater than.5  
B.equal to 1  
C.equal to zero  
D. equal to 0.5

6.
For the standard normal distribution, the mean is:
A  zero and the standard deviation is 1 
B  1 and the standard deviation is 1 
C  1 and the standard deviation is zero 
D  0.5 and the standard deviation is 0.5 
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7.
For the standard normal distribution, the area between z = 0 and z = 2.38, rounded to four decimal places, is: ___________________
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the tolerance is +/2%
8.
For the standard normal distribution, the area to the right of z = 1.21, rounded to four decimal places, is: ___________________
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the tolerance is +/2%
9.
For the standard normal distribution, the area between z = 0.19 and z = 0.92, rounded to four decimal places, is: _______________
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the tolerance is +/2%
10.
The GMAT scores of all examinees who took that test this year produce a distribution that is approximately normal with a mean of 410 and a standard deviation of 49.
The probability that the score of a randomly selected examinee is between 400 and 480, rounded to four decimal places, is: ___________________
The probability that the score of a randomly selected examinee is less than 370, rounded to four decimal places, is: ___________________
The probability that the score of a randomly selected examinee is more than 530, rounded to four decimal places, is: ____________________
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