Stats Part 2 Test with Complete Solutions
The box plots below show the distribution of grades in one class on two tests.
Which measures of center and variability would be best to use when making comparisons of the two data sets? - Answer-mean and MAD
Takiya recorded the heights of two sets of...
Stats Part 2 Test with Complete
Solutions
The box plots below show the distribution of grades in one class on two tests.
Which measures of center and variability would be best to use when making
comparisons of the two data sets? - Answer-mean and MAD
Takiya recorded the heights of two sets of plants, one set planted in the shade and one
set planted in full sun. Her data are shown in the plots below.Which best explains the
variability of the sets? - Answer-The full sun plants set has greater variability because
the IQR for full sun plants is greater.
The sets of data below show the heights, in inches, of students in two different
preschool classes.The teachers of the two classes want to compare the heights of their
students. Which statements about the data sets are accurate? Check all that apply. -
Answer-Because the sets are not symmetrical, the IQR should be used to compare the
data sets.
Because the sets contain outliers, the median should be used to compare the data sets.
The mean cannot be accurately determined based on the type of data display.
A county manager used a representative sample of two populations in the county to
determine the number of pounds of trash thrown away per person per week. The results
are shown in the dot plots below.The town manager uses the median to show that the
average amount of trash thrown away per person per week in each sample is the same.
What is the town manager's error? - Answer-He should have used the mean to
determine the average because the data sets are approximately symmetric.
Mr. Lew recorded the average length, in minutes, of phone calls received at work. He
recorded the data in the box plots below.Which is an accurate comparison of the two
data sets? - Answer-Time spent on professional calls is typically shorter but less
consistent than time spent on personal calls.
The amount of time, in hours, babies spent sleeping in two different nurseries is shown
on the dot plots below.Which describes an inference that Mrs. Hardison might make
after comparing the means of the two data sets? - Answer-The babies in Nursery 2
spent more time napping.
Two sets of data are each symmetrical and do not contain outliers. Which measures of
center and variability would be most effective to use when making comparisons
between the two data sets? - Answer-mean and MAD
A hockey coach recorded the number of shots taken by the home team and the number
taken by the visiting team in 20 games. He displayed the results in the box plots below.
, Which describes an inference that the coach might make after comparing the medians
of the two data sets? - Answer-NOT C
Micah estimated the amount of time his mom and dad spend reading bedtime stories.
He plotted the data in the box plot below. Which is an accurate comparison of the two
data sets? - Answer-The lengths of time that his mom reads are typically longer and
have more variability than the lengths of time that his dad reads.
A business owner collected data on the people working for her company. She
determined the average number of minutes each employee spent on breaks during an
average workday. The data, broken up by gender, is shown below.The business owner
uses the median and IQR to determine the center and variability of the data sets. Which
best describes the comparison? - Answer-NOT B A
The two sets of data below show the number of bubbles blown in fifty trials using two
different bubble solutions.Which best describes the measure of center that can be used
to most accurately compare the two data sets? - Answer-NOT B
The box plots below show the distribution of salaries, in thousands, among employees
of two small companies. Which measures of center and variability would be best to use
when making comparisons of the two data sets? - Answer-median and IQR
Martin kept track of the number of times he had to flip a coin before it landed tails up.
Number of Flips to Land Tails Up
Which is a true statement about the dot plot? - Answer-Six times it took 4 flips of the
coin to land tails up.
The dot plot shows the birth year of everyone who works at Sam's office. The youngest
person who works there was born in 1987. Sam described the data as having a spread
from 1965 to 1987, four gaps, a peak at 1984, and a center of 1978. Where did Sam
make an error? - Answer-The spread is from 1966 to 1987
What is true of the data in the dot plot? Check all that apply.
Number of Minutes for Each Commercial Break - Answer-The center is 3
The peak is 5
It is symmetric
The spread is from 1 to 5
There were 14 commercial breaks
Where is the gap in the data?
Number of Patients Per Hour Who Waited Longer than 15 Minutes - Answer-4
Which best describes the clusters in the data set?
Number of Fish in Each Tank at the Pet Store - Answer-There are two clusters, at 10
and 11, and at 13, 14, and 15.
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