STATS quiz 2 review 1 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS
The measure of location which is the most likely to be D
influenced by extreme values in the data set is the
a. range.
b. median.
c. mode.
d. mean.
If two groups of numbers have the same mean, then D
a. their standard deviations must also be equal.
b. their medians must also be equal.
c. their modes must also be equal.
d. other measures of location need not be the same.
The mean of the sample D
a. is always smaller than the mean of the population from
which the sample was taken.
b. can never be zero.
c. can never be negative.
d. can assume any value between the highest and the
lowest value in the sample.
When a percentage of the smallest and largest values are C
deleted from a data set, the mean of the remaining data
values is the
a. geometric mean.
b. weighted mean.
c. trimmed mean.
d. interquartile mean.
Which of the following provides a measure of central B
location for the data?
a. Standard deviation
b. Mean
c. Variance
d. Range
In computing the mean of a sample, the value of ∑xi is A
divided by
a. n.
b. n - 1.
c. n + 1.
d. n - 2.
, The mean of a sample D
a. is always equal to the mean of the population.
b. is always smaller than the mean of the population.
c. is computed by summing the data values and dividing
the sum by (n - 1).
d. is computed by summing all the data values and
dividing the sum by the number of items.
The hourly wages of a sample of 130 system analysts are B
given below.
mean = 60 range = 20
mode = 73 variance = 324
median = 74
The coefficient of variation equals
a. 0.30%.
b. 30%.
c. 5.4%.
d. 54%.
The variance of a sample of 169 observations equals 576. B
The standard deviation of the sample equals
a. 13.
b. 24.
c. 576.
d. 28,561.
The median is a measure of C
a. relative dispersion.
b. absolute dispersion.
c. central location.
d. relative location.
The 50th percentile is the B
a. mode.
b. median.
c. mean.
d. third quartile.
The 75th percentile is referred to as the C
a. first quartile.
b. second quartile.
c. third quartile.
d. fourth quartile.
The measure of location which is the most likely to be D
influenced by extreme values in the data set is the
a. range.
b. median.
c. mode.
d. mean.
If two groups of numbers have the same mean, then D
a. their standard deviations must also be equal.
b. their medians must also be equal.
c. their modes must also be equal.
d. other measures of location need not be the same.
The mean of the sample D
a. is always smaller than the mean of the population from
which the sample was taken.
b. can never be zero.
c. can never be negative.
d. can assume any value between the highest and the
lowest value in the sample.
When a percentage of the smallest and largest values are C
deleted from a data set, the mean of the remaining data
values is the
a. geometric mean.
b. weighted mean.
c. trimmed mean.
d. interquartile mean.
Which of the following provides a measure of central B
location for the data?
a. Standard deviation
b. Mean
c. Variance
d. Range
In computing the mean of a sample, the value of ∑xi is A
divided by
a. n.
b. n - 1.
c. n + 1.
d. n - 2.
, The mean of a sample D
a. is always equal to the mean of the population.
b. is always smaller than the mean of the population.
c. is computed by summing the data values and dividing
the sum by (n - 1).
d. is computed by summing all the data values and
dividing the sum by the number of items.
The hourly wages of a sample of 130 system analysts are B
given below.
mean = 60 range = 20
mode = 73 variance = 324
median = 74
The coefficient of variation equals
a. 0.30%.
b. 30%.
c. 5.4%.
d. 54%.
The variance of a sample of 169 observations equals 576. B
The standard deviation of the sample equals
a. 13.
b. 24.
c. 576.
d. 28,561.
The median is a measure of C
a. relative dispersion.
b. absolute dispersion.
c. central location.
d. relative location.
The 50th percentile is the B
a. mode.
b. median.
c. mean.
d. third quartile.
The 75th percentile is referred to as the C
a. first quartile.
b. second quartile.
c. third quartile.
d. fourth quartile.
