Nurs 3205 Chapter 14 Statistical Analysis of
Quantitative Data questions with correct answers
Purposes of Statistical Analysis in Quantitative Research Correct
Answer-- to describe the data (ex. sample characteristics)
- to test hypothesis
- to provide evidence regarding measurement properties of quantified
variables
Level of Measurements: Nominal Correct Answer-lowest level of
measurement
involves using numbers simply to categorize attributes
Level of Measurements: Ordinal Correct Answer-ranks people on an
attribute
Level of Measurements: Interval Correct Answer-ranks people on an
attribute AND specifies the distance between them (ex. temperature
because a 0 in temperature will mean that it is cold, not that there is an
absence in temperature)
Pretty precise
Ratio Correct Answer-Highest level
Ratio scales
,Unlike interval scales, have a meaningful zero and provide information
about the absolute magnitude of the attribute
A researcher measures the weight of people in a study involving obesity
and type II diabetes. What type of measurement is being employed?
A. Nominal
B. Ordinal
C. Interval
D. Ratio Correct Answer-D
because there is a real zero in weight
Many physical measures, such as a person's weight, are ratio measures.
Gender is an example of a nominally measured variable. A measurement
of ability to perform ADLs is an example of ordinal measurement, and
interval measurement occurs when researchers can rank people on an
attribute and specify the distance between them, e.g., psychological
testing.
Descriptive Statistics Correct Answer-- Used to describe and synthesize
data
--parameters: descriptor for a population
--Statistics: descriptive index from a sample
Inferential Statistics Correct Answer--Used to make inferences about the
population based on sample data
Frequency Distributions Correct Answer-- impose order on numeric data
, - a systematic arrangement of numeric values on a variable from lowest
to highest and a count of the number of times ( and/ or percentage) each
value was obtained
Frequency distributions can be described in terms of Correct Answer-
Shape
Central Tendency
Variability
How are Frequency Distributes presented? Correct Answer-Can be
presented in a table (Ns and percentages) or graphically (e.g., frequency
polygons- scores on horizontal line and frequency on y axis)
Shapes of Distributions Correct Answer-Symmetry- symmetric
Skewed- asymmetric- the peak is off center and one tail is longer than
the other.
-Positive skew
-Negative skew
Positive skew Correct Answer-- long tail points to the right
Negative skew Correct Answer-- long tail points to the left
Symmetric Distribution Correct Answer-
Quantitative Data questions with correct answers
Purposes of Statistical Analysis in Quantitative Research Correct
Answer-- to describe the data (ex. sample characteristics)
- to test hypothesis
- to provide evidence regarding measurement properties of quantified
variables
Level of Measurements: Nominal Correct Answer-lowest level of
measurement
involves using numbers simply to categorize attributes
Level of Measurements: Ordinal Correct Answer-ranks people on an
attribute
Level of Measurements: Interval Correct Answer-ranks people on an
attribute AND specifies the distance between them (ex. temperature
because a 0 in temperature will mean that it is cold, not that there is an
absence in temperature)
Pretty precise
Ratio Correct Answer-Highest level
Ratio scales
,Unlike interval scales, have a meaningful zero and provide information
about the absolute magnitude of the attribute
A researcher measures the weight of people in a study involving obesity
and type II diabetes. What type of measurement is being employed?
A. Nominal
B. Ordinal
C. Interval
D. Ratio Correct Answer-D
because there is a real zero in weight
Many physical measures, such as a person's weight, are ratio measures.
Gender is an example of a nominally measured variable. A measurement
of ability to perform ADLs is an example of ordinal measurement, and
interval measurement occurs when researchers can rank people on an
attribute and specify the distance between them, e.g., psychological
testing.
Descriptive Statistics Correct Answer-- Used to describe and synthesize
data
--parameters: descriptor for a population
--Statistics: descriptive index from a sample
Inferential Statistics Correct Answer--Used to make inferences about the
population based on sample data
Frequency Distributions Correct Answer-- impose order on numeric data
, - a systematic arrangement of numeric values on a variable from lowest
to highest and a count of the number of times ( and/ or percentage) each
value was obtained
Frequency distributions can be described in terms of Correct Answer-
Shape
Central Tendency
Variability
How are Frequency Distributes presented? Correct Answer-Can be
presented in a table (Ns and percentages) or graphically (e.g., frequency
polygons- scores on horizontal line and frequency on y axis)
Shapes of Distributions Correct Answer-Symmetry- symmetric
Skewed- asymmetric- the peak is off center and one tail is longer than
the other.
-Positive skew
-Negative skew
Positive skew Correct Answer-- long tail points to the right
Negative skew Correct Answer-- long tail points to the left
Symmetric Distribution Correct Answer-
