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WorksheetsCentral Tendency and Standard Deviation
Total questions: 63
Worksheet time: 2hrs 3mins
What is the first step when looking at data?
Find the mean
Put them in order from least to greatest
Sort the data into categories
Find the range
The mean of a data set can be found by...
subtracting the minimum from the maximum
choosing the middle number
choosing the number that occurs most
finding the sum of the numbers and then dividing by the total amount of numbers in the data set
There can be more than one mean
True
False
There can be more than one mode
True
False
The median of the numbers 34, 32, 12, 65, and 45 is...
34
32
12
65
The number of cars in the parking lot.
discrete data
continuous data
The number of computers in a library.
discrete data
continuous data
Time taken to complete homework.
discrete data
continuous data
The weight of an elephant.
discrete data
continuous data
The number of pets per family in a city.
discrete data
continuous data
The number of questions you answered correctly in this test.
discrete data
continuous data
The speed of cars.
discrete data
continuous data
The amount of rain, in cm, that falls in a storm.
discrete data
continuous data
The average temperature of the last month.
discrete data
continuous data
The time to compete a 1000 m race.
discrete data
continuous data
7,13,18,24,9,3,18
which score occurred most often?
59,65,61,62,55
what is the mean of the time taken?
100, 101, 102, 100, 101, 102, 100, 101, 102, 100
9, 8, 12, 6, 10
What is the mean number of pages she wrote per day?
36, 42, 28, 52, 48, 36, 31
What is the mean number of miles Jenna cycled?
5, 4, 7, 15, 12, ___
What is the mean of the data set shown?
81
2,430
5.13
8
What is the interquartile range of the data set shown?
6
2
3
5
The heights in inches of seven basketball players are listed below.
72, 74, 80, 86, 78, 85, 83
What is the interquartile range of the heights?
10
81
11
12
Which is a true statement about a measure of center and a measure of variation?
A measure of center is the same as a measure of variation.
A measure of center describes how the numbers vary within a data set, while a measure of variation summarizes the data.
A measure of center summarizes the data, while a measure of variation describes how the numbers vary within a data set
A measure of center determines the center of the data, while a measure of variation measures how the data varies with another data set.
Which has a larger standard deviation?
(a)
Set 1-Standard Deviation=3.1
Set 2-Standard Deviation=4.9
Set 3-Standard Deviation=1.7
Set 4-Standard Deviation=3.2
Which set of data probably has the points closest to the mean?
What is the standard deviation for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
6.89
10.1
7.26
9
What does this symbol represent?
Standard Deviation
Variance
Mean Absolute Deviation
Median
What is the standard deviation for the data given:
{12, 13, 29, 18, 61, 35, 21}
293.67
15.87
17.14
41.98
What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
47.47
102.01
52.77
81
What is the variance for the data given:
5, 10, 7, 12, 0, 20, 15, 22, 8, 2
47.47
102.01
52.77
81
Order the dot plots from least to greatest standard deviation.
A, D, C, B
B, C, D, A
A, D, B, C
B, C, A, D
1. An Outlier Is…
A value that is in the middle of a data set.
A value very close to the mean of the data set.
A value that is an abnormal distance from other points in the data set.
A number that makes more sense to use in the context of a data set.
Ervin bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is the sample standard deviation of Ervin's scores?
511.33
22.61
438.48
20.94
In a population of five university students with GPAs of 2.5, 2.3, 1.7, 1.4, and 1.1, a sample of three students are considered. What would be the standard deviation of the resulting sampling distribution?
0.53
0.41
0.35
0.22
If the variance of a data set is equal to 19, what is the standard deviation? (Round 2 decimal places)
(a)
What is the upper quartile of the set of data; 2, 4, 6, 6, 7, 8, 10
4
6
8
2
The median test score is 80.
The lower quartile is 65.
The upper quartile is 90.
The IQR is 30.
What does a quartile mean?
One fourth of the data.
One half of the data.
Some data only.
All of the data.
