Test bank for Essential Statistics, 3rd Edition, Robert N. Gould, Colleen Ryan, Rebecca Wong., All chapters

TESTBANK
b

,MULTIPLE CHOICE. b




Choose the one alternative that best completes the statement or answers the question.
b b b b b b b b b b b b




Solve the problem.
b b




1) In a sample of 775 senior citizens, approximately 67% said that they had seen a television
b b b b b b b b b b b b b b b 1) b




commercial for life insurance. About how many senior citizens is this?
b b b b b b b b b b b




A) Not enough information available. B) 519 b b b b




C) 67 b D) 256 b




Answer: B b




2) A two-way table could be used for which of the following pairs of variables?
b b b b b b b b b b b b b 2) b




A) Gender and age B) Age and favorite class b b b b b b




C) Gender and favorite class b D)Age and height b b b b b b




Answer: C
b b




Indicate whether the study described is an observational study or a controlled experiment.
b b b b b b b b b b b b




3) "People with diabetes are at higher risk for certain cancers than those without the blood sugar
b b b b b b b b b b b b b b b 3) b




disease, suggests a new study based on a telephone survey of nearly 400,000 adults."
b b b b b b b b b b b b b b




A) Controlled experiment B) Observational study b b b




Answer: B
b b




SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
b b b b b b b b b b b b b b b




Answer the question.
b b




4) The number of clinically obese men in State A is 156,261 and the number of clinically obese men
b b b b b b b b b b b b b b b b b 4) b




in State B is 294,269. Someone makes the claim that this is evidence that men exercise more in
b b b b b b b b b b b b b b b b b b




State A. What information is missing that might contradict this claim?
b b b b b b b b b b b




Answer: We need to know the total number of men in State A and State B so that a
b b b b b b b b b b b b b b b b b b




comparison can be made of the percentage of the men in each state that are clinically
b b b b b b b b b b b b b b b b




obese. There could be a much higher male population in State B than State A. Also,
b b b b b b b b b b b b b b b b




assumptions about exercise and obesity are being made.
b b b b b b b b




1

,MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
b b b b b b b b b b b b b b




Use the data in Table 1A to answer the question.
b b b b b b b b b




Note: 1 is female, 0 is male.
b b b b b b




5) Suppose you wanted to know whether the student's commute distance was associated with the
b b b b b b b b b b b b b 5) b




student's living situation. Using the data table if possible, which variables would you
b b b b b b b b b b b b b




use? b




A) Use Commute Distance (Miles) and Living Situation. b b b b b b




B) Data on student's living situation are not included in this study. b b b b b b b b b b




C) Use Commute Distance (Miles) and College Units Acquired. b b b b b b b




D) UseCollegeUnitsAcquired and LivingSituation. b b b b b b




Answer: A
b b




In a study of 1350 elementary school children, 118 out of the 615 girls in the study said they want to be a teacher when they
b b b b b b b b b b b b b b b b b b b b b b b b b




grow up.
b b




6) What percent of girls want to be a teacher when they grow up?
b b b b b b b b b b b b 6)
A) 45.6% B) 80.8% C) 8.7% b b D) 19.2% b




Answer: D b




Determine if the following scenario is an observational study or a controlled experiment.
b b b b b b b b b b b b




7) A doctor is interested in determining whether a certain medication increases the risk of high blood
b b b b b b b b b b b b b b b 7) b




pressure. He randomly selects 100 people for his study - 50 who will take the medication, and 50 who
b b b b b b b b b b b b b b b b b b b




will take a placebo. He checks the patients' blood pressures weekly for six months.
b b b b b b b b b b b b b b




A) Observational study B) Neither C) Controlled experiment b b b b




Answer: C
b b




Solve the problem.
b b




8) The number of parents who attended parent teacher conferences at a local elementary school is an
b b b b b b b b b b b b b b b
8) b




example of what type of variable?
b b b b b b




A) Numerical variable B) Categorical variable C)Neither b b b b




Answer: A
b b




2

, SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
b b b b b b b b b b b b b b b




Determine if the following scenario is an observational study or a controlled experiment and explain your reasoning.
b b b b b b b b b b b b b b b b




9) A doctor is interested in determining whether a certain medication is effective at treating
b b b 9) b b b b b b b b b b b




abdominal pain. He reviews his patients' medical records and finds that a higher
b b b b b b b b b b b b b




proportion of people who took the medication fewer abdominal pain symptoms than those
b b b b b b b b b b b b b




who did not take the medication.
b b b b b b




Answer: This is an observational study because the doctor did not randomly assign patients
b b b b b b b b b b b b b




into groups. Instead, he simply looked at medical files.
b b b b b b b b b




MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. Solve
b b b b b b b b b b b b b b b




the problem.
b b




10) A two-way table is useful for describing which types of variables?
b b b b b b b b b b 10) b




A) One numerical variable. b b




B) Two categorical variables. b b




C) One numerical variable and one categorical variable.
b b b b b b




D) Two numerical variables. b b




Answer: B
b b




11) The following data table is organized using which method?
b b b b b b b b 11) b




Gender Age
Male 35
Female 42
Female 33
Male 37
Female 39 b b




A) This is stacked data because each row represents one person.
b b b b b b b b b




B) This is unstacked data because the ages are separated by groups (in this case, gender).
b b b b b b b b b b b b b b




C) This is stacked data because the ages are separated by groups (in this case, gender).
b b b b b b b b b b b b b b




D) This is unstacked data because each row represents one person.
b b b b b b b b b




Answer: A
b b




SHORT ANSWER. Write the word orphrase that best completes each statement or answers the question.
b b b b b b b b b b b b b b b




12) According to the following two-way table, why are percentages more useful than counts to
b b b b b b b b b b b b b
12) b




compare the amount of males and females who eat breakfast?
b b b b b b b b b b




Answer: The group sizes are different. There are 55 males, but only45 females.
b b b b b b b b b b b b b




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