3-questions-total-chart-attached-for-probelm-3-11

Question 1

3.1 Nausea from air sickness affects some travelers. A drug company, wanting to establish the effectiveness of its motion sickness pill, randomly gives either its pill or a look-alike sugar pill (placebo) to 200 passengers.

Degree of Nausea

None Slight Moderate Severe Total

Pill 43 36 18 3 100

Placebo 19 33 36 12 100

Total

(a) Complete the marginal totals.

(b) Calculate the relative frequencies separately for each row.

Question 2

3.2 Breakfast cereals from three leading manufacturer can be classified either above average or below average in sugar content. Data for ten cereals from each manufacturer are give below.

Below Average Above Average Total

General Mills 2 8 10

Kellogg’s 3 7 10

Quaker 4 6 10

(a) Complete the marginal tools,

(b) Calculate the relative frequencies separately for each row.

Question 3

3.11 Refer to Exercise 3.10. Not all surgery cases, even of the same type, are equally serious. Large research hospitals tend to get the most serious surgery cases, whereas community hospitals tend to get more of the routine cases. Suppose that patients can be classified as being in either “Good” or “Poor” condition and the outcomes of surgery are as shown in the table on the next page.

Calculate the proportions that survive for each hospital and each condition.

From these data, which hospital would you choose if you were in good condition? If you were in bad condition?

Survival Rates by Condition

Good Condition Poor Condition

Died Survived Total Died Survived Total

Research Hosiptal 15 685 700 Research hospital 75 1425 1500

Community hospital 16 584 600 Community hospital 7 93

Total 31 1269 1300 Total 82 1518 1600