HCD 300 REVIEW (EXAM 1) QUESTIONS WITH
VERIFIED ANSWERS 2026
Subtracting the lowest value of a data set from the highest value of a data set results in
this measure.
- Range
- Interquartile Range
- Mode
- Median - Answers - Range
T/F: Standard deviation = variance squared - Answers - F - Standard deviation is square
root of variance
This is the value obtained by: sum(X/n)
- Interquratile range
- Standard deviation
- Mean
- Variance - Answers - Mean
The average variation from the mean:
- interquartile range
- range
- variance
- standard deviation - Answers - Standard deviation
The reason we use n-1 in the denominator of the standard deviation formula
- to obtain an unbiased estimate
- to artificially increase the standard deviation
- to be conservative in the estimation of variability
- we do not use n-1 in the formula - Answers - - to obtain an unbiased estimate
- to artificially increase the standard deviation
- to be conservative in the estimation of variability
T/F: A test must first be reliable before it can be valid - Answers - True
Comparing two different tests (such as an oral and ear thermometer) we can determine
- Test-retest reliability
- Parallel forms reliability
- interrater reliability
, - internal consistency reliability - Answers - Parallel forms reliability
Comparing the percent agreement between two observers on a particular test:
- test-retest reliability
- parallel forms reliability
- interrater reliability
- internal consistency reliability - Answers - interrater reliability
If a test is consistent over time it has:
- test-retest reliability
- parallel forms reliability
- interrater reliability
- internal consistency reliability - Answers - test-retest reliability
T/F: Content "validity" is confirmed when experts determine the rest reflects the
universe of items in the topic being "measured" - Answers - T
To establish this, we correlate the scores of our current measure to scores from a valid,
similar established measure
- predictive validity
- content validity
- construct validity
- concurrent validity - Answers - concurrent validity
T/F: Predictive validity and concurrent validity are types of construct validity - Answers -
F - criterion validity
On a box plot, the IQR represents ___% of the distribution
- 25
-7
- 50
- 100 - Answers - 50
T/F: On a box plot 50% of the data fall below the mean - Answers - T - median is the
middle value of the series of data
On a box plot ____% of the values fall below Q3
- 25
- 75
- 50
- 100 - Answers - 75
VERIFIED ANSWERS 2026
Subtracting the lowest value of a data set from the highest value of a data set results in
this measure.
- Range
- Interquartile Range
- Mode
- Median - Answers - Range
T/F: Standard deviation = variance squared - Answers - F - Standard deviation is square
root of variance
This is the value obtained by: sum(X/n)
- Interquratile range
- Standard deviation
- Mean
- Variance - Answers - Mean
The average variation from the mean:
- interquartile range
- range
- variance
- standard deviation - Answers - Standard deviation
The reason we use n-1 in the denominator of the standard deviation formula
- to obtain an unbiased estimate
- to artificially increase the standard deviation
- to be conservative in the estimation of variability
- we do not use n-1 in the formula - Answers - - to obtain an unbiased estimate
- to artificially increase the standard deviation
- to be conservative in the estimation of variability
T/F: A test must first be reliable before it can be valid - Answers - True
Comparing two different tests (such as an oral and ear thermometer) we can determine
- Test-retest reliability
- Parallel forms reliability
- interrater reliability
, - internal consistency reliability - Answers - Parallel forms reliability
Comparing the percent agreement between two observers on a particular test:
- test-retest reliability
- parallel forms reliability
- interrater reliability
- internal consistency reliability - Answers - interrater reliability
If a test is consistent over time it has:
- test-retest reliability
- parallel forms reliability
- interrater reliability
- internal consistency reliability - Answers - test-retest reliability
T/F: Content "validity" is confirmed when experts determine the rest reflects the
universe of items in the topic being "measured" - Answers - T
To establish this, we correlate the scores of our current measure to scores from a valid,
similar established measure
- predictive validity
- content validity
- construct validity
- concurrent validity - Answers - concurrent validity
T/F: Predictive validity and concurrent validity are types of construct validity - Answers -
F - criterion validity
On a box plot, the IQR represents ___% of the distribution
- 25
-7
- 50
- 100 - Answers - 50
T/F: On a box plot 50% of the data fall below the mean - Answers - T - median is the
middle value of the series of data
On a box plot ____% of the values fall below Q3
- 25
- 75
- 50
- 100 - Answers - 75
