MCGRAW HILL CH. 3 REVIEW TEST
BANK QUESTIONS WITH COMPLETE
SOLUTIONS – UPDATED!!
Measures of dispersion - Answer-We can use numerical descriptive measures to extract
meaningful information from data. Which measure gauges the underlying variability of
the data?
Multiple choice question.
Measures of shape
Measures of central location
Measures of association
Measures of dispersion
mode - Answer-Which of the measures of central location is defined as the observation
that occurs most frequently?
Multiple choice question.
Median
Mean
Range
Mode
Mode
Mean
Median - Answer-What are the three most widely used measures of central location?
Multiple select question.
Mode
Mean
Range
Median
2 - Answer-A large lecture class has 280 students. The professor has announced that
the mean score on an exam is 74 with a standard deviation of 8. The distribution of
scores is bell-shaped. How many standard deviations above the mean would a score of
90 be?
Multiple choice question.
1.5
2
3
1
parameter; statistic - Answer-We refer to the population mean as a ____ and the
sample mean as a ____.
, First; Second; Third - Answer-The 25th percentile is also referred to as the '' quartile,
the 50th percentile is referred to as the '' quartile, and the 75th percentile is referred to
as the '' quartile.
median - Answer-Which of the measures of central location is defined as the middle
value of a data set; that is, an equal number of observations lie above and below it?
Multiple choice question.
Median
Range
Mean
Mode
range
mean absolute deviation
interquartile range - Answer-There are several measures of dispersion that gauge the
variability of a data set. Select all of the measures below that are useful for measuring
dispersion.
Multiple select question.
range
mean absolute deviation
Use the mean
interquartile range
unimodal; bimodal - Answer-If a variable has one mode, then we say it is '' If it has two
modes, then it is common to call it ''.
range - Answer-The '' is the simplest measure of dispersion; it is the difference between
the maximum and the minimum observations of a variable.
Approximately 95% of all observations fall in the interval x̄ ±2
Almost all observations fall in the interval ̄x±3
Approximately 68% of all observations fall in the interval x̄ ±s - Answer-Given a sample
mean ̄x, a sample standard deviation s, and a relatively symmetric and bell-shaped
distribution, the empirical rule states that: (Select all the apply)
Multiple select question.
Approximately 90% of all observations fall in the interval x̄ ±2
Approximately 95% of all observations fall in the interval x̄ ±2
Almost all observations fall in the interval ̄x±3
Approximately 68% of all observations fall in the interval x̄ ±s
75% - Answer-A percentile is technically a measure of location; however, it is also used
as a measure of relative position because it is so easy to interpret. if you know that the
raw score corresponds to the 75th percentile, then you know that approximately how
many students had scores lower than your score?
Multiple choice question.
BANK QUESTIONS WITH COMPLETE
SOLUTIONS – UPDATED!!
Measures of dispersion - Answer-We can use numerical descriptive measures to extract
meaningful information from data. Which measure gauges the underlying variability of
the data?
Multiple choice question.
Measures of shape
Measures of central location
Measures of association
Measures of dispersion
mode - Answer-Which of the measures of central location is defined as the observation
that occurs most frequently?
Multiple choice question.
Median
Mean
Range
Mode
Mode
Mean
Median - Answer-What are the three most widely used measures of central location?
Multiple select question.
Mode
Mean
Range
Median
2 - Answer-A large lecture class has 280 students. The professor has announced that
the mean score on an exam is 74 with a standard deviation of 8. The distribution of
scores is bell-shaped. How many standard deviations above the mean would a score of
90 be?
Multiple choice question.
1.5
2
3
1
parameter; statistic - Answer-We refer to the population mean as a ____ and the
sample mean as a ____.
, First; Second; Third - Answer-The 25th percentile is also referred to as the '' quartile,
the 50th percentile is referred to as the '' quartile, and the 75th percentile is referred to
as the '' quartile.
median - Answer-Which of the measures of central location is defined as the middle
value of a data set; that is, an equal number of observations lie above and below it?
Multiple choice question.
Median
Range
Mean
Mode
range
mean absolute deviation
interquartile range - Answer-There are several measures of dispersion that gauge the
variability of a data set. Select all of the measures below that are useful for measuring
dispersion.
Multiple select question.
range
mean absolute deviation
Use the mean
interquartile range
unimodal; bimodal - Answer-If a variable has one mode, then we say it is '' If it has two
modes, then it is common to call it ''.
range - Answer-The '' is the simplest measure of dispersion; it is the difference between
the maximum and the minimum observations of a variable.
Approximately 95% of all observations fall in the interval x̄ ±2
Almost all observations fall in the interval ̄x±3
Approximately 68% of all observations fall in the interval x̄ ±s - Answer-Given a sample
mean ̄x, a sample standard deviation s, and a relatively symmetric and bell-shaped
distribution, the empirical rule states that: (Select all the apply)
Multiple select question.
Approximately 90% of all observations fall in the interval x̄ ±2
Approximately 95% of all observations fall in the interval x̄ ±2
Almost all observations fall in the interval ̄x±3
Approximately 68% of all observations fall in the interval x̄ ±s
75% - Answer-A percentile is technically a measure of location; however, it is also used
as a measure of relative position because it is so easy to interpret. if you know that the
raw score corresponds to the 75th percentile, then you know that approximately how
many students had scores lower than your score?
Multiple choice question.
