a. 0.782 to 0.818 b. 0.120 to 0.280 c. 0.765 to 0.835 Exhibit 12-3 In order to d

Question

a.       0.782 to 0.818

b.      0.120 to 0.280

c.      0.765 to 0.835

Exhibit 12-3

In order to determine whether or not a particular medication waseffective in curing the common cold, one group of patients wasgiven the medication, while another group received sugar pills. Theresults of the study are shown below.

                                    Patients Cured

          Patients Not Cured

Received medication

70

10

Received sugar pills

20

50

We are interested in determining whether or not the medicationwas effective in curing the common cold.

a.       70

b.      150

c.       28

d.      48

38. Refer to Exhibit 12-3. The hypothesis is to be testedat the 5% level of significance. The critical value from thetable.

a.       3.84

b.      7.81

c.       5.99

d.      9.34

A. 563

B. 4161

C. 189

D. 1068

E. 2401

40. If the level of confidence is increased from 90% to 95%, butthe allowable error and the standard deviation remain the same,what happens to the required sample size?

A) Increases

B) Decreases

C) Remains unchanged

D) None of the above

1. For the values 25, 25, 25, 25, and 25, the standard deviationis equal to

A. 2.5.

B. 1.

C. 0.

D. 5.

5. Viewership studies using a sample of television householdsindicate that the share of the audience for the Channel 4 News hasincreased by 12% since Jayne Barnwell was added to the 11:00 P.M.news team. This is an example of

A. inferential statistics.

B. descriptive statistics.

C. prescriptive statistics.

D. None of the preceding.

7. What is the shape of a frequency distribution with a mean of47.0, a median of 48.1, and a mode of 50.0?

A. skewed to the right

B. skewed to the left

C. flat D. symmetric

E. none of the above

8. A study of the length of time, in days, that a traffic lightwill operate was conducted by the city traffic engineer. Thevariance of the length of time the traffic will operate is in

A. days.

B. days squared.

C. hours.

D. percent.

E. None of these is correct.

                                    Patients Cured

          Patients Not Cured

Received medication

70

10

Received sugar pills

20

50

Explanation / Answer

I believe Answers are: 36. (D) 37. (?) Sorry I have no Idea About this Question. 38. (?) Sorry I have no Idea About this Question. 39. (D)

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