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Statistical skills can play an important role

in nursing because they help nurses to:

a. Calculate appropriate doses and clinical measurements

b. Generate clinical questions

c. Evaluate and

generate research evidence for nursing practice

d. Make better use of computers and the Internet

2. An example of a variable is:

a.

Systolic blood pressure

b. Pi (?)

c. 52.5 kilograms

d. Number of seconds in a minute

3. Which

of the following is nota component

of a research question?

a. An independent variable

b. A population

c. A sample

d. A dependent variable

4. Identify the dependent variable in the

following: In elderly men, what is the effect of

chronic fatigue on level of

depression?

a. Age

b. Sex

c. Chronic fatigue

d. Depression

5. Which of the following is a continuous (vs.

discrete) variable?

a. Number of pages in a book

b. Age

at death

c. Falls during hospitalization

d. Number of times married

6. The measurement level that classifies

attributes, indicates magnitude, and has equal

intervals between values, but does

not have a rational zero, is:

a. Nominal

b. Ordinal

c. Interval

d. Ratio

7. The measurement

level that is sometimes called categorical

or qualitativeis:

a. Nominal

b. Ordinal

c. Interval

d. Ratio

8. It is not

meaningful to calculate an arithmetic average with data from which of the

following?

a. Nominal measures

b. Ordinal measures

c. Nominal

and ordinal measures

d. All measures can be meaningfully averaged.

9. Degree of pain

measured as none, a little, or a lot is measured on which of the

following

scales?

a. Nominal

b. Ordinal

c. Interval

d. Ratio

10.

Body temperature is measured on which of the following scales?

a. Nominal

b. Ordinal

c.

Interval

d. Ratio

11. Type of birth (vaginal

or cesarean) is measured on the:

a. Nominal

scale

b. Ordinal scale

c. Interval scale

d. Ratio scale

12.

Which of the following is a ratio-level

measure?

a. Dietary

cholesterol intake (mg)

b. Cognitive impairment on a 50-item scale

c. Pain on a 10-point scale

d. Military rank

13.

Ratio-level measures are different than

any other level by virtue of which property?

a. Classification

b. Equal intervals between values

c. A

true, rational zero

d. Indication of magnitude

14.

Researchers typically collect data from

a ________ and hope to generalize their results

to a _____________. (Fill in the

blanks.)

a. Population, sample

b. Statistic, parameter

c. Sample, statistic

d. Sample,

population

15.

If the average amount of sleep for all

people in the United States was 7.6 hours per night,

this average would be a _________ of the population of U.S. residents.

(Fill in the

blank.)

a. Variable

b. Parameter

c.

Statistic

d. Datum

16.

If a nurse researcher measured the

anxiety level of 100 hospitalized children, the

childrenâ€™s average score on an

anxiety scale would be a:

a. Variable

b. Parameter

c. Statistic

d. Operational definition

17.

Statistical methods that are used to

draw conclusions about a population are called:

a. Inferential

statistics

b. Descriptive statistics

c. Univariate statistics

d. Multivariate statistics

18.

Which of the following variables is most

likely to be negatively skewed in a general

population?

a. Number of times arrested

b. Age at retirement

c. Number of times married

d. Age at birth

19.

A normal distribution is not:

a. Skewed

b. Leptokurtic

c. Platykurtic

d. All of the above

The next eight questions pertain to the following table

(Table 2):

Table 2

Number of Pregnancies of Study Participants

Frequency

Percentage

Cumulative Percentage

0

24

11.1

11.1

1

29

13.5

24.6

2

78

36.3

60.9

3

46

21.4

82.3

4

22

10.2

92.5

5

11

5.1

97.6

6

4

1.9

99.5

7

1

0.4

100.0

Total

215

100.0

20. In Table 2, the variable is _______

and the measurement level is _________.

(Fill in

the blanks.)

a. Discrete, interval

b.

Discrete, ratio

c. Continuous, interval

d. Continuous, ratio

21.

In Table 2, the value of n is:

a. 24

b. 100.0

c. 215

d. 7

22.

In Table 2, the cumulative relative

frequency for five or fewer pregnancies is:

a. 210

b. 199

c. 92.5

d. 97.6

23.

The best way to graph information in

Table 2 would be to construct:

a. A

histogram

b. A pie chart

c. A bar graph

d. Either a pie chart or a bar graph

24.

In Table 2, the distribution of data

would be described as:

a. Symmetric

b. Positively

skewed

c. Negatively skewed

d. It cannot be determined.

25.

In Table 2, the distribution of data

would be described as:

a. Unimodal

b. Bimodal

c. Multimodal

d. It cannot be determined.

26.

In Table 2, the most likely number to be an outlier is:

a. 0

b. 1

c. 7

d. 24

==================================================================

27. Central tendency indexes are all of the

following except which of the

following

statements?

a. They are descriptive statistics.

b. They summarize how dispersed a set of scores is.

c. They provide

information about a value around which scores cluster.

d. They are appropriate for interval- and ratio-level

measures.

28.

In the following distribution (10 11

12 13 14 15 15

15 15) the mode is:

a. 11

b. 12

c. 14

d. 15

29.

In the following distribution (10 11

12 13 14

15 15 15 15)

the median is:

a. 11

b. 12

c. 14

d. 15

30.

The median is all of the following except:

a. The 50th percentile

b. The point that divides a distribution in half

c. Q2

d. The

most popular score in the distribution

31.

In which type of distribution is the

mean a higher value than the median or mode?

a. A leptokurtic

distribution

b. A positively skewed distribution

c. A negatively skewed distribution

d. A normal distribution

32.

If there are outliers at either end of a distribution that is symmetric, a

researcher might:

a. Calculate a trimmed mean

b. Report the median rather than the mean

c. Report the mode rather than the mean

d. Omit the variable from further analyses

33.

Which of the following indexes of

dispersion is notin the original

units of measurement

of the variable?

a. Range

b. Interquartile

range

c. Standard deviation

d. Variance

34.

Which of the following indexes involves

the calculation of deviation scores (x)?

a. Range

b. IQR

c. SD (standard deviation)

d. Median

35.

Which of the following indexes involves

the calculation of percentiles?

a. z

b. IQR

c. SD

d. Mean

36.

What percentage of cases for a normally

distributed variable lies within 1 SDabove

and

below the mean?

a. 34%

b. 50%

c. 68%

d. 95%

37.

In calculating standard scores

(z-scores), which two descriptive statistics are needed?

a. Median, IQR

b. Median, percentiles

c. Mean, Range

d. Mean,

SD

38.

A z

score of 0.00 corresponds to an original score that:

a. Could not be used in the calculation of the mean

b. Is the same as the mean in the original distribution

c. Is

the lowest score in the original distribution

d. Is an outlier

39.

A z

score of -1.00 corresponds approximately to a score for a normally

distributed

variable that is at the:

a. 1st percentile

b. 10th percentile

c. 16th percentile

d. 84th percentile

Questions

40 through 43 pertain to the following table (Table 3):

Table 3

Characteristics

of Chemotherapy Patients (N=100)

Characteristic

Mean (SD)

Median

Age (years)

48.9 (9.8)

47.0

Body mass index (BMI) (kg/m2)

27.0 (6.0)

25.1

Number of positive nodes

3.4 (2.9)

2.0

Dose of cyclophosphamide (mg)

1063.0 (477.0)

1250.0

Dose of doxorubicin (mg)

125.0 (53.0)

125.0

Degree of nausea, 0-100 scale

52.1 (25.0)

52.0

40.

Refer to Table 3. For the variable body

mass index,the variance is:

a. 27.0

b. 27.02

c. 6.0

d. 36.0

41.

Refer to Table 3. For the variable number

of positive nodes,the statistics suggest that the

distribution is:

a. Positively

skewed

b. Negatively skewed

c. Symmetric

d. Normal

42.

Refer to Table 3. Assume that the distribution for the variable degree of nauseais

normally distributed. In such a

case, out of the 100 sample members, approximately how

many gave a nausea rating of 77 or

higher?

a. 0

b. 3

c. 16

d. 34

43.

Refer to Table 3. Which variable in Table 3 is most likely to be negatively

skewed?

a. Age

b. Body mass index

c. Dose of

cyclophosphamide

d. Dose of doxorubicin

44.

Refer to Table 3. For the variable body

mass index,what would be the standard score for

a person whose BMI was 21.0?

a. -1.0

b. 0.0

c. 1.0

d. 2.0

45. Another name for a crosstab

table is a:

a. Scatterplot

b. Frequency distribution

c. Contingency

table

d. Relative risk table

46. In a 4 X 3 contingency table, how many

variables would there be?

a. 2

b. 4

c. 7

d. 12

47.

In a 4 X 3 contingency table, how many

cells would there be?

a. 2

b. 4

c. 7

d. 12

48.

Which measurement scale(s) are most

amenable to cross-tabulation?

a. Nominal only

b. Nominal and ordinal

c. Nominal, ordinal, and interval

d. Nominal, ordinal,

interval, and ratio

49.

A widely reported and intuitively appealing risk index for comparing risk

outcomes is:

a. Relative risk (RR)

b. Absolute risk (AR)

c. Odds

ratio (OR)

d. Number needed to treat (NNT)

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