Karen's first psychology exam score is 1 standard deviation from the mean in a normal distribution. The test has a mean of 75 and a standard deviation of 5 . Karen's percentile rank would be
a. 16.
b. 54.
c. 70.
d. cannot determine from the information given
A measurement procedure is valid if it ____.
a. produces measurements that are stable and consistent
b. measures what you intend it to measure
c. produces measurements that make sense
d. produces measurements that are obvious
Approximately what percentage of scores are between z=1 and z=2?
a. 50
b. 68
c. 16
d. 13.5
When creating an operational definition, care should be taken to ____.
a. maximize face validity, even if at the costs of other types of validity
b. avoid leaving out important components of the construct
c. improve reliability by including components that are not part of the construct
d. measure just one aspect of the construct, leaving the others for later
Rich's first psychology exam score is +1 standard deviation from the mean in a normal distribution. The test has a mean of 60 and a standard deviation of 6 . Rich's percentile rank would be approximately
a. 70.
b. 84.
c. 66.
d. cannot determine from the information given
Research results indicate that the more time individuals spend watching educational television programs as preschool children, the higher their high school grades will be. This is an example of a ____ relationship between variables.
a. cause-and-effect
b. coincidental
c. positive
d. negative
If the average height for women is normally distributed with a mean of 65 inches and a standard deviation of 2.5 inches, then approximately 95 of all women should be between _____ and _____ inches in height.
a. 62.5; 67.7
b. 60; 70
c. 57.5; 72.5
d. cannot determine from the information given
If people score high on one measure and score low on another measure, there is ____
a. a positive relationship between the two measures
b. a negative relationship between the two measures
c. no relationship between the two measures
d. a cause-and-effect relationship between the two measures
Faculty in the psychology department at State University consume an average of 5 cups of coffee per day with a standard deviation of 1.5 . The distribution is normal. How many cups of coffee would an individual at the 25th percentile drink per day?
a. 4
b. 5
c. 6
d. 7
If people score low on one measure and also score low on another measure, there is ____
a. a positive relationship between the two measures
b. a negative relationship between the two measures
c. no relationship between the two measures
d. a cause-and-effect relationship between the two measures
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