Question 1

A __________ is a quick and easy way to put a list of numbers into order while getting a picture of their shape.

Accepted Answer

stemplot

Question 2

For Questions , use the following narrative
Narrative: School costs
Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below:
  
-{School cost narrative} What is the shape of this data set?

Accepted Answer

Skewed to the right.Data also has an outlier on the high end.

Question 3

One or two scores that are far removed from the rest of the data are called __________.

Accepted Answer

outliers

Question 4

For Questions , use the following narrative
Narrative: School costs
Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below:
  
-{School cost narrative} How many schools were sampled in this study?

Accepted Answer

The answer of For Questions , use the following narrative
Narrative:...

Question 5

Which of the following statements is true?
A)If a data set is skewed to the right, that means there is bias in the results; the data are higher than they should be.
B)If a data set is skewed to the right, then the higher values are more spread out than the lower values.
C)If a data set is skewed to the right, then the lower values are more spread out than the higher values.
D)None of the above.

Accepted Answer

Skewness refers to the asymmetry of a distribution. If a distribution is skewed to the right, it means that the tail on the right-hand side of the distribution is longer than the left-hand side. This means that there are some higher values that are farther away from the bulk of the data than the lower values. Therefore, the higher values are more spread out than the lower values. Choice A is incorrect because skewness does not necessarily imply bias. Choice C is incorrect because the opposite is true in a right-skewed distribution.

Question 6

For Questions , use the following narrative
Narrative: School costs
Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below:
  
-{School cost narrative} Two measures of center were calculated for this data set and were found to be $26,668, and $34,832.One of them is the mean, and the other is the median.Which one is which, and how do you know that?

Accepted Answer

The answer of For Questions , use the following narrative
Narrative:...

Question 7

Which of the following measures of center is affected by an outlier?
A)Mean
B)Median
C)Mode
D)All of the above

Accepted Answer

The mean is calculated by adding all the values and dividing by the number of values. An outlier can greatly affect the sum of the values and therefore impact the mean. The median and mode are not affected by outliers because they only consider the middle or most frequent value(s), respectively.

Question 8

Name the four kinds of useful information that you can get about a set of measurement data once it has been organized and summarized.

Accepted Answer

The answer of Name the four kinds of useful information...

Question 9

A data set is __________ if the two halves of the data set (when cut down the middle) are mirror images of each other.

Accepted Answer

The answer of A data set is __________ if the...

Question 10

If the bars of a histogram represent the proportion of the total count that falls into each interval, what must the heights of the bars sum to?
A)The total number of numbers in the data set.
B)One.
C)1 divided by the total number of intervals used in the histogram.
D)Not enough information to tell.

Accepted Answer

The heights of the bars on a histogram represent the proportion of the total count that falls into each interval. Therefore, the heights of the bars must sum to one or 100% of the total count.

Question 11

The mode is most meaningful for which type of data?
A)Measurement data
B)Categorical data
C)Biased data
D)None of the above

Accepted Answer

The mode is most meaningful for categorical data, where we are interested in identifying the most frequent category. In measurement data, the mode may not be meaningful as there can be multiple values with the same frequency. Biased data does not relate to the applicability of the mode.

Question 12

The __________ is a measure of center with half of the scores falling at or above it and half of the scores falling at or below it.

Accepted Answer

The answer of The __________ is a measure of center...

Question 13

For Questions , use the following narrative
Narrative: Quiz scores
Bob has taken 6 quizzes so far in his statistics class.Each quiz has a possible of 10 total points.Bob's scores are the following: 10, 8, 9, 7, 2, and 9.
-{Quiz scores narrative} Find the three measures of center for Bob's quiz scores.

Accepted Answer

The answer of For Questions , use the following narrative
Narrative:...

Question 14

Which of the following pictures of a data set allows you to retrieve the actual data (assuming no digits are dropped)?
A)A histogram
B)A stemplot
C)Both a and b
D)Neither a nor b

Accepted Answer

A stemplot displays the actual digits of a data set while a histogram only displays the frequency of each data point in intervals/bin ranges.

Question 15

For Questions , use the following narrative
Narrative: Quiz scores
Bob has taken 6 quizzes so far in his statistics class.Each quiz has a possible of 10 total points.Bob's scores are the following: 10, 8, 9, 7, 2, and 9.
-{Quiz scores narrative} Explain how (if) Bob's lowest quiz score affects the mean and the median of this data set.

Accepted Answer

The answer of For Questions , use the following narrative
Narrative:...

Question 16

Which of the following statements regarding stemplots is false?
A)A stemplot allows you to retrieve the original data (assuming no digits are dropped).
B)A stemplot can never reuse the same stem digit twice.
C)If a certain value in your data set is repeated three times, it must appear 3 times in appropriate stem and leaf of the stemplot.
D)None of the above statements are false.

Accepted Answer

A stemplot can reuse the same stem digit if the leaf values for each use of that digit are distinct. For example, a stemplot could have stems of 1 and 2, with leaves of 0 and 5 for both stems.

Question 17

What is the simplest measure of variability in a data set?
A)The interquartile spread
B)The outliers
C)The range
D)The standard deviation

Accepted Answer

Range is the simplest measure of variability in a data set. It is calculated as the difference between the maximum and minimum values in the data set.

Question 18

The amount of spread in the data is a measure of what characteristic of a data set?
A)Center
B)Variability
C)Shape
D)None of the above

Accepted Answer

Variability refers to how spread out the values in a data set are. Therefore, the amount of spread in the data is a measure of variability.

Question 19

Name two questions that can be answered by determining the shape of a data set.

Accepted Answer

The answer of Name two questions that can be answered...

Question 20

For Questions , use the following narrative
Narrative: School costs
Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below:
  
-{School cost narrative} Describe the four important characteristics of this data set (for example, the shape) using words that a parent exploring the cost of liberal arts colleges would find useful.

Accepted Answer

The answer of For Questions , use the following narrative
Narrative:...

Quiz 7: Summarizing and Displaying Measurement Data

A __________ is a quick and easy way to put a list of numbers into order while getting a picture of their shape.

For Questions , use the following narrative Narrative: School costs Suppose a random sample of liberal arts schools was taken, and the average cost per student was measured for each school.The data are pictured in the histogram below: -{School cost narrative} What is the shape of this data set?

One or two scores that are far removed from the rest of the data are called __________.

Which of the following statements is true?

Which of the following measures of center is affected by an outlier?

Name the four kinds of useful information that you can get about a set of measurement data once it has been organized and summarized.

A data set is __________ if the two halves of the data set (when cut down the middle) are mirror images of each other.

If the bars of a histogram represent the proportion of the total count that falls into each interval, what must the heights of the bars sum to?

The mode is most meaningful for which type of data?

The __________ is a measure of center with half of the scores falling at or above it and half of the scores falling at or below it.

Which of the following pictures of a data set allows you to retrieve the actual data (assuming no digits are dropped) ?

Which of the following statements regarding stemplots is false?

What is the simplest measure of variability in a data set?

The amount of spread in the data is a measure of what characteristic of a data set?

Name two questions that can be answered by determining the shape of a data set.