Data Analysis: Descriptive And Inferential Statistics

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Question 1

Free

Multiple Choice

The nurse researcher is interested in estimating how reliably data can be used to generalize the findings of a study. In order for this to occur, the researcher should use what?

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Inferential statistics

Descriptive statistics

Nonparametric statistics

Mathematical statistics

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Question 2

Free

Multiple Choice

The nurse researcher is interested in describing and summarizing the characteristics of the sample used in the research study. In order for this to occur, the researcher should use what?

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Inferential statistics

Descriptive statistics

Nonparametric statistics

Mathematical statistics

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Question 3

Free

Multiple Choice

A nurse researcher would opt to use measures of central tendency in which case?

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When there is a need to describe how reliably the findings can be generalized

When there is a need to describe how much dispersion is in the sample

When there is a need to describe the accuracy of predictions made

When there is a need to describe the average member of the sample

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Question 4

Free

Multiple Choice

The nurse researcher is interested in describing the assignment of numbers to objects or events. This is best achieved in which way?

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Through use of prediction

Through use of dispersion

Through use of variability

Through use of measurement

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Question 5

Free

Multiple Choice

A nurse researcher determines the assignment of a number to an object for measurement by verifying what?

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The objects vary within a narrow range to meet category requirements.

All objects assigned a specific measurement number are similar to all other objects assigned the same number.

The objects assigned to one specific number are positively related to the dependent variable of the study.

The objects assigned to one specific number are positively related to the independent variable of the study.

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Question 6

Multiple Choice

The nurse researcher is interested in having the greatest flexibility possible in choosing statistical procedures. The level of measurement used to achieve this is what?

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Nominal

Ordinal

Interval

Ratio

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Question 7

Multiple Choice

The nurse researcher is interested in using nominal level data. The object or event that could be used if nominal-level data are of primary interest is what?

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Test scores

Education level

Marital status

Weight

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Question 8

Multiple Choice

The nurse researcher is using a research study that involved categories of patient weights. The level of measurement that would be most appropriate in this study is what?

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Nominal

Ordinal

Interval

Ratio

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Question 9

Multiple Choice

The nurse researcher opts to use interval-level data. The researcher's primary concern will be what?

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Categories must be mutually exclusive.

Intervals between data categories must be equal.

The rank of zero (0) represents the absence of the measured variable.

Variance between assigned categories is qualitative rather than quantitative.

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Question 10

Multiple Choice

The nurse researcher opts to use ratio-level data. The researcher's primary concern will be what?

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Categories must be mutually exclusive.

Intervals between data categories must be equal.

The rank of zero (0) represents the absence of the measured variable.

Variance between assigned categories is qualitative rather than quantitative.

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Question 11

Multiple Choice

The nurse researcher is using a nursing degree as a variable in a research study. The level of measurement most appropriate in this case is what?

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Nominal

Ordinal

Interval

Ratio

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Question 12

Multiple Choice

The nurse researcher is using respiratory rate as a variable in a research study. The level of measurement most appropriate in this case is what?

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Nominal

Ordinal

Interval

Ratio

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Question 13

Multiple Choice

The nurse researcher is using the percentage of nurses holding various nursing degrees as a variable in a research study. Which type of statistics is most appropriate in this case?

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Inferential statistics

Descriptive statistics

Nonparametric statistics

Mathematical statistics

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Question 14

Multiple Choice

The nurse researcher opts to group frequency data using large interval widths in a research study. Which problem may be encountered by using this type of interval widths?

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Overlap can occur.

Patterns can be obscured.

Means cannot be determined.

Some data may not fit into any category.

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Question 15

Multiple Choice

Which term represents the most frequent score in a frequency distribution?

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Mean

Mode

Median

Percentile

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Question 16

Multiple Choice

The nurse researcher's data contain extremes of high and low scores. The measure of central tendency that should be used in order to be least affected by extremes of high and low scores is what?

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Mean

Mode

Median

Percentile

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Question 17

Multiple Choice

The nurse researcher should report the mean, mode, and median of a variable in a research study in which case?

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When the distribution is uneven.

When the distribution is wide.

When the distribution is narrow.

When the distribution is symmetrical.

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Question 18

Multiple Choice

The nurse researcher opts to use a measure of variability. Which measure of variability does the researcher recognize as being most unstable?

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Mean

Median

Range

Semiquartile range

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Question 19

Multiple Choice

The nurse researcher finds that the data include a score reported to be in the 75th percentile. The researcher interprets this to mean what?

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The score is at the median.

The score has exceeded the mode.

The score is exceeded by only 25% of the cases.

The score represents the average of all scores measured at this time.

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Question 20

Multiple Choice

In a study of nurses' willingness to care for patients with a contagious disease, it was found that the greater the nurses' spirituality, the greater the willingness to provide care. This finding represents what?

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No correlation

Perfect correlation

Positive correlation

Negative correlation

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