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STATISTICS (STA) 261 FINAL EXAM (ACTUAL
2025/2026) QUESTIONS AND VERIFIED ANSWERS.
the distinction between descriptive and inferential statistics is that: -
(answers)descriptive statistics describe data sets, inferential statistics make
predictions for the populations
the z-score and percentile are measures of - (answers)relative location
the sampling frame is the - (answers)list of all elements in a population
the percentage of data points falling at or below the upper quartile is -
(answers)75
a distribution can have more than one - (answers)mode
in terms of sensitivity, how would it be ordered
least sensitive<sensitive<most sensitive - (answers)median<trimmed mean<mean
suppose that for a set of numeric data, where the numbers are not all different,
the standard deviation is less than 1.0. Then it must be true that - (answers)the
variance<standard deviation
discrete variable - (answers)whole number
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continous variable - (answers)decimal
the event, "not A" is called the __________ of "event A" - (answers)complement
given a choice of unbiased statistics, the best statistic would be the one with a
sampling distribution that - (answers)has the smallest variance
A good fit of the simple linear regression model would be - (answers)a relatively
large r2 and a relatively small standard error
type 1 error - (answers)rejecting Ho when Ho is true
type 2 error - (answers)failing to reject Ho when Ho is false
center - (answers)median
spread - (answers)how it is distributed
shape - (answers)symmetric
skewed left
skewed right
STATISTICS (STA) 261 FINAL EXAM (ACTUAL
2025/2026) QUESTIONS AND VERIFIED ANSWERS.
the distinction between descriptive and inferential statistics is that: -
(answers)descriptive statistics describe data sets, inferential statistics make
predictions for the populations
the z-score and percentile are measures of - (answers)relative location
the sampling frame is the - (answers)list of all elements in a population
the percentage of data points falling at or below the upper quartile is -
(answers)75
a distribution can have more than one - (answers)mode
in terms of sensitivity, how would it be ordered
least sensitive<sensitive<most sensitive - (answers)median<trimmed mean<mean
suppose that for a set of numeric data, where the numbers are not all different,
the standard deviation is less than 1.0. Then it must be true that - (answers)the
variance<standard deviation
discrete variable - (answers)whole number
, 2|Page
continous variable - (answers)decimal
the event, "not A" is called the __________ of "event A" - (answers)complement
given a choice of unbiased statistics, the best statistic would be the one with a
sampling distribution that - (answers)has the smallest variance
A good fit of the simple linear regression model would be - (answers)a relatively
large r2 and a relatively small standard error
type 1 error - (answers)rejecting Ho when Ho is true
type 2 error - (answers)failing to reject Ho when Ho is false
center - (answers)median
spread - (answers)how it is distributed
shape - (answers)symmetric
skewed left
skewed right
