Question

1. a good rule of thumb when presenting data with a graph is to

a. label all items

b. make sure your graph communicates only one idea

c. limit the number of words

d. all of the above

2. in a normal distribution with a mean of 100 and a standard deviation of 15. what is the probability that a score will be 85 or lower?

3. which of the following sets of scores has the least variability?

a. 7,10,11,15,19

b. 7,7,8,8,10,11

c. 6,6,7,7,7,7

d. 7,7,7,7,7,7

4. which of the following correlations would be interpreted as a very weak relationship?

a. -0.35

b. -0.83

c. 0.15

d. 0.75

5. In the following data set, what is the mode? Dataset (n=5): 6,4,1,3,6

a. 3

b. 6

c. 4

d. 1

6. in a well-designed study, it is possible to generalize your results from the study sample to population

T/F

7. All statistically significant results are meaningful

T/F

8. in the field of health administration, statistics is used for:

a.conducting research

b. guiding policy changes

c. measuring performance

d. all of the above

Answer 1

1. When presenting a graph, the rule of thumb is to label

all the items. Hence, Option (a) is the correct choice. (Ans).

2. Let X ~ N(100, 15) i.e. (X - 100)/15 ~ N(0,1).

P(X < 85) = P[(X - 100)/15 < (85 - 100)/15]

= P[(X - 100)/15 < -1] = 1 - (-1) = 1 - 0.1587 = 0.8413. (Ans).

3. In a dataset if all the values are same then the variability

is the least that is 0. Hence, Option (d) is the correct choice.

(Ans).

4. Lower the absolute value of correlation, weaker the

relationship. Hence, Option (c) is the correct choice. (Ans).

5. The mode is the most frequent observation in the

dataset. Here, it is 6. Hence, Option (b) is the correct

choice. (Ans).

6. If the sample is a good representative of the population,

then it is possible to generalize the results of sample to

population. Hence, the given statement is True. (Ans).

7. All statistically significant results are not meaningful.

Hence, the given statement is False. (Ans).

8. In the health administration, statistics is used for all the

given cases. (Ans).