Project #71263 - Stats

Final

 

Statistics 2000

 

Comprehensive

 

 

 

Use the following setting to answer questions 1 through 8. A study was conducted, in Germany, on 791 victims of heart attacks to see if certain days of the week were associated with more or less than their share of heart attacks. Here are the results by day of the week and the number of heart attacks that occurred on that particular day.

 

 

 

Day                 Attacks

 

Monday          145                              [You might want to write these results down

 

Tuesday          105                              separately to have easy access to them

 

Wednesday     111                              when answering questions 1 through 8]

 

Thursday        120

 

Friday             97

 

Saturday          115

 

Sunday            98

 

 

 

Total               791

 

 

 

1.  If the day of the week is “fair” in relation to the number of heart attacks, based on this study how many should occur on any given day?

 

 

 

            a.  1/7              b.  791             c.  113             d.  7

 

 

 

2.  What is the margin of error associated with this study?

 

 

 

            a.  .143                        b.  .036            c.  .001                        d.  7

 

 

 

3.  What is your estimate of the probability of heart attacks occurring on Monday?

 

 

 

            a.  .143                        b.  .183            c.  .036                        d.  .145

 

 

 

4.  If the day of the week is “fair” in relation to the number of heart attacks, what should be the probability of a heart attack occurring on Monday?

 

 

 

            a.  .143                        b.  .183            c.  .036                        d.  .145

 

 

 

5.  If the relative frequency of heart attacks occurring on Friday is .123 and the margin of error is .021, then does this study indicate day of the week for Friday is “fair” or not?

 

 

 

            a.  Fair             b.  Not Fair

 

 

 

6.  What does your answer to question 5 mean?       

 

 

 

a.     Fewer heart attacks occur than expected on Friday if “fair”

 

b.     More heart attacks occur than expected on Friday if “fair”

 

c.     The number of heart attacks that occur on Friday is what was expected if “fair”

 

 

 

7.  If the relative frequency of heart attacks occurring on Monday is .185 and the margin of error is .035, then does this study indicate day of the week for Monday is “fair” or not?

 

 

 

            a.  Fair             b.  Not Fair

 

 

 

8.  What does your answer to question 7 mean?       

 

 

 

a.     Fewer heart attacks occur than expected on Monday if “fair”

 

b.     More heart attacks occur than expected on Monday if “fair”

 

c.     The number of heart attacks that occur on Monday is what was expected if “fair”

 

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Use the following setting to answer questions 9 through 23.  Caffeinated coffee truly enables a person to feel more alert. In an attempt to demonstrate the validity of this assertion (hypothesis) a study was conducted as described below. 30 people who volunteered to participate in this study were randomly assigned to one of two groups. The first drank 12 ounces of caffeinated coffee (caf group) and the second drank 12 ounces of decaffeinated coffee (decaf group). After one hour each participant was asked to read a chapter of a very technical manuscript and then was asked 10 questions about the material he or she had read. The score below represents how many questions out of the 10 were answered correctly by each participant. [You might want to write these results down separately to have easy access to them when answering questions 9 through 23]

 

 

 

Caf Group                  8     6     7     9     5     7     8     9     6     4     5     7     8     6     10

 

 

 

Decaf Group              6     6     8     6     4     6     4     8     7     4     5     5     6     7      8

 

 

 

9.  The hypothesis in the problem setting is what type of hypothesis?

 

 

 

            a.  Null            b. Alternative              c.  Test

 

 

 

10.  What is the mean of the Caf Group?

 

 

 

            a.  6.00                        b.  7.00            c.  9.00                        d.  1.00

 

 

 

11.  What is the mode of the Caf Group?

 

 

 

            a.  6.00                        b.  7.00            c.  8.00                        d.  6.00, 7.00, and 8.00

 

 

 

12.  What is the range for the Caf Group?

 

 

 

            a.  4 to 10        b.  10               c.  6                 d.  7

 

 

 

13.  The Decaf Group is what type of a group?

 

 

 

            a. Treatment                b. Comparison            c. Control        d. Placebo

 

 

 

14.  What is the median of the Decaf Group?

 

 

 

            a.  8.00                        b.  7.00            c.  6.00                        d.  1.00

 

 

 

15.  What is the first quartile (Q1) for the Decaf Group?

 

 

 

            a.  4                 b.  5                 c.  6                 d.  7

 

 

 

16.  What is the third quartile (Q3) for the Decaf Group?

 

 

 

            a.  4                 b.  5                 c.  6                 d.  7

 

 

 

17.  Which of the following depicts the skewness of the Decaf Group?

 

 

 

a.     Very slightly right skewed

 

b.     Very slightly left skewed

 

c.     Symmetric

 

d.     Non-symmetric

 

 

 

For questions 17 through 22 ASSUME 

 

 

 

                                                            Caf Group      Decaf Group

 

            Mean                                         7.00                 6.00

 

            Sum of Squared Deviations     40.00               28.00

 

 

 

18.  What is the deviation associated with the smallest score in the Caf Group?

 

 

 

            a.  1.0              b.  8.0              c.  4.0              d.  -3.0

 

 

 

19.  What is the squared deviation associated with the largest score in the Caf Group?

 

 

 

            a.  3.0              b.  9.0              c.  -3.0             d. None of these

 

 

 

20.  What is the variance of the Caf Group?

 

 

 

            a.  40.00          b.  2.67            c.  2.86                        d. 1.69             e.  None of these

 

 

 

21.  What is the standard deviation of the Decaf Group?

 

 

 

            a.  28.00          c.  1.37                        d.  2.00            d.  1.41            e.  None of these

 

 

 

22.  What is the level of measurement for the variable in this alertness study?

 

 

 

            a. Categorical               b.  Ordinal         c.  Ratio         d. # of questions answered correctly

 

 

 

23.  Based on the results to be assumed (just above question 17), “Does caffeine seem to enable the participants in this study to be more alert?

 

 

 

a.     Yes, because the mean of the Caf Group is larger than the mean of the Decaf Group

 

b.     Yes, because the sum of squared deviations is larger for the Caf Group than it is for the Decaf Group

 

 

 

 

 

Match the numbers 24 through 31 with the letters “A” through “H” (each letter is to be used once and only once)

 

 

 

24.  Relative frequency                                                           A.  Design

 

 

 

25.  Fair                                                                                   B.  Dependent variable

 

 

 

26.  A variable used to predict another variable                     C.  H0 

 

 

 

27.  Total net gain = total net loss                                          D.  Estimate of Probability

 

 

 

28.  A manner in which an experiment is conducted              E.  HA

 

      

 

29.  A supposition which is tentatively accepted to              F.  Independent variable

 

       explain certain facts to provide a basis for

 

       further investigation.                                                       

 

 

 

30.  A statement about a population that we would              G. EV = 0

 

       like to demonstrate is true or correct.                 

 

31.  A variable that is predicted by another variable              H.  Pr(event) =

 

 

 

------------------------------------------------------------------------------------------------------------------

 

           

 

32.  What level of measurement is the variable movie category?

 

 

 

            a. Categorical               b.  Ordinal                   c.  Ratio           d.  Quantitative

 

 

 

33.  What level of measurement is the variable grade in class in percent?

 

 

 

            a. Categorical               b.  Ordinal                   c.  Ratio           d.  Qualitative

 

 

 

34.  What level of measurement is the variable annual salary measured according to the scale (1=under $20,000; 2=$20,001 to $30,000; 3=$30,001 to $40,000; 4=over $40,000)

 

 

 

            a.  Categorical b.  Ordinal                   c.  Ratio           d.  Qualitative

 

 

 

35.  What is the difference between a scatterplot and a time plot?

 

 

 

a.     Scatterplot has two variables and a time plot has only one.

 

b.     Scatterplot and time plot are the same, except a time plot uses time in its vertical axis.

 

c.     Scatterplot and time plot are the same, except a time plot uses time in its horizontal axis

 

d.     No difference, they are two names for the very sample plot.

 

 

 

36.  The plot of the daily Dow Jones Average over the past year would be?

 

 

 

            a.  Index           b.  Time Plot               c.  Scatterplot              d.  Time Series

 

 

 

37.  Is a person’s attitude about the death penalty related to her or his attitude about gun control?

 

 

 

a.     Form 1 question                b.  Form 2 question                 c.  Form 3 question

 

 

 

38.  Does a person’s attitude about freedom of speech predict her or his attitude about the right to criticize government officials?

 

 

 

            a.  Form 1 question                b.  Form 2 question                 c. Form 3 question

 

 

 

39.  In general what might you think the relationship between altitude and temperature might be?

 

 

 

            a.  Negative Correlation          b.  Positive Correlation           c.  Zero Correlation

 

 

 

40.  In general what might you think the relationship between the GPA (Grade point average) in high school and GPA in college might be?

 

 

 

            a.  Negative Correlation          b.  Positive Correlation           c.  Zero Correlation

 

 

 

Match the following statements (41 through 45) with the personal probability rule (A through E) that is being illustrated.

 

 

 

41.  Good things only happen to me                                      A.  Detailed Imagination

 

 

 

42.  If I have heard it once, I have heard it 100 times             B.  Representativeness Heuristic

 

 

 

43.  Once I saw the image on the TV, I couldn’t get              C.  Optimism

 

       it out of my head

 

                                                                                                D.  Anchoring

 

44.  The longer I listened to the story, the more it

 

       seemed so real                                                                  E.  Availability Heuristic

 

 

 

45.  Everything the fortune teller told me agreed

 

       completely with what I already knew

 

 

 

Match the number 46 through 50 with the letters “A” through “E.”

 

 

 

46.  Biased Sample Selection                                      A.  Salk Study

 

 

 

47.  Roosevelt versus Landon                                     B.  1970 Draft Lottery

 

 

 

48.  The Biggest Public Health Experiment Ever        C.  Expected Value

 

 

 

49.  Break the Bank at Monte Carlo                           D.  Literary Digest

 

 

 

50.  Insurance Company Rates                                   E.  Margin of Error

 

Subject Mathematics
Due By (Pacific Time) 05/15/2015 09:30 pm
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