CSLB C10 TEST 1 EXAMPREP STUDY GUIDE
2026 PRACTICE QUESTIONS AND SOLUTIONS
◉ Sampling variability refers to:
a. differences in the value of the average of sample due to the
presence of lurking variables
b. the different values that a variable can have
c. the different averages measured from different samples (selected
out of the same population), even if the sample sizes are the same.
Answer: c
◉ Question on bias/variability - Two studies were recently
published on the effects of exercise and longevity. Both studies were
conducted on two different random samples of male rats. Both
samples of the same size. General conclusions were the same in both
studies, however values of averages of certain measures were not
the same. Such discrepancy might have been most likely caused by:
a. sampling variability
b. sampling bias. Answer: a
◉ Question on bias/lurking variable - Researchers conducted an
experiment with male rats aimed at studying the effects of exercise
on longevity. The sample included rats of different species, but
conclusions referred to all male rats.
, a. testing on different species might result in non-response bias
b. the species might be a lurking variable. Answer: b
◉ Question on ethical principles - Researchers conducted an
experiment with male rats aimed at studying the effects of exercise
on longevity. Following ethical principles:
a. the study does not need to be approved by a review board,
because it does not involve humans
b. the researchers should use the largest number of rats possible
according to one of the ethical principles
c. the researchers should determine the need to use rats for the
study, vs. conducting the research without animals. Answer: c
◉ Right-skewed data will have:
a. median and mode at center of histogram
b. median higher than mean
c. median lower than mean. Answer: c
◉ I have the following age groups in my data: 0-20, 21-39, 40-65 Age
is a ____________________ value
a. quantitative
b. categorical. Answer: b
2026 PRACTICE QUESTIONS AND SOLUTIONS
◉ Sampling variability refers to:
a. differences in the value of the average of sample due to the
presence of lurking variables
b. the different values that a variable can have
c. the different averages measured from different samples (selected
out of the same population), even if the sample sizes are the same.
Answer: c
◉ Question on bias/variability - Two studies were recently
published on the effects of exercise and longevity. Both studies were
conducted on two different random samples of male rats. Both
samples of the same size. General conclusions were the same in both
studies, however values of averages of certain measures were not
the same. Such discrepancy might have been most likely caused by:
a. sampling variability
b. sampling bias. Answer: a
◉ Question on bias/lurking variable - Researchers conducted an
experiment with male rats aimed at studying the effects of exercise
on longevity. The sample included rats of different species, but
conclusions referred to all male rats.
, a. testing on different species might result in non-response bias
b. the species might be a lurking variable. Answer: b
◉ Question on ethical principles - Researchers conducted an
experiment with male rats aimed at studying the effects of exercise
on longevity. Following ethical principles:
a. the study does not need to be approved by a review board,
because it does not involve humans
b. the researchers should use the largest number of rats possible
according to one of the ethical principles
c. the researchers should determine the need to use rats for the
study, vs. conducting the research without animals. Answer: c
◉ Right-skewed data will have:
a. median and mode at center of histogram
b. median higher than mean
c. median lower than mean. Answer: c
◉ I have the following age groups in my data: 0-20, 21-39, 40-65 Age
is a ____________________ value
a. quantitative
b. categorical. Answer: b
