WorksheetsMeasures of Dispersion 2
Total questions: 20
Worksheet time: 2hrs 40mins
What is the maximum value?
58
66
64
60
What data value is the upper quartile (Q3)?
64
62
66
58
What percent of the data is between 25 and 30 on the number line?
25%
50%
75%
100%
What percentage of the data is between 90 and 140?
25%
75%
50%
100%
What is the interquartile range (IQR) of the data set?
20
5
25
10
Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the range of Ervin's scores?
193
60
127
66
Find the mean of these numbers:
2, 57, 38, 42, 6
29
50
38
145
What percentage of the data is between 40 and 150?
25%
50%
75%
100%
Which of the following best describes the process of finding the range for a set of data?
ADD the biggest and smallest numbers
Place the number in order from least to greatest then find the middle.
Find the difference between the Maximum and the Minimum.
Find the average.
What type of graph is this?
Bar Graph
Line Plot
Histogram
Pie Chart
How many people watched more than 6 hours of TV?
10
20
5
17
Which interval has the greatest number of students?
48-51
60-63
56-59
64-67
What is the range of the following set of data?
15, 25, 33, 33, 42, 47
33
34
32
35
Which curve has the greater standard deviation?
Red
Blue
Black
Yellow
Adam's Z-score on a test is +2.5. What does this mean?
He'd better start studying.
He scored 2.5 standard deviations above the average.
He did better than EVERYONE.
He did terrible.
Joanne's Z-score is -1.5. What does this mean?
She didn't take the test yet.
She did better than most people.
She scored 1.5 standard deviations below the average.
No clue
What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
6.89
7.26
10.1
9
What is measures of dispersion?
> Describe as the thickness of the data set.
>It measures the spread of the data about the mean value.
> It includes range , interquartile range, standard deviation and variance.
>It measures how far each number in the set is from the mean and thus from every other number in the set.
This is used to make estimates or inferences about the population standard deviation.
Sample Standard Deviation
Population Standard Deviation
Grouped Data
Ungrouped Data
Standard deviation is a measure of theamount of variation or dispersion of a set ofvalues. A ______ standard deviation indicatesthat the values tend to be close to the meanof the set, while a high standard deviationindicates that the values are spread outover a wider range.
very high
high
average
low
