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WorksheetsChapter 2 Part 2
Total questions: 50
Worksheet time: 2hrs 9mins
Determine the IQR for this set of data. 12, 13, 14, 15, 17, 18, 19, 19, 22, 23
14
5
17.5
19
The median test score is 80.
The lower quartile is 65.
The upper quartile is 90.
The IQR is 30.
What is the interquartile range (IQR)?
20
25
30
50
how many people voted in this dot plot
4
9
3
not here
This time series plot is an example of:
An increasing trend
Seasonal variation
A decreasing trend
A structural change
Which table represents the data in the graph?
Which of the following is a pareto chart?
In a pareto chart, data has to be in ____.
any order
ascending order
descending order
none of these
If I tell you that you scored at the 55th percentile on your final exam, you would know:
55% of the class scored the same or worse than you did
You earned a 55% on the exam
You failed the exam
45% of the class scored worse than you did
You are told that your height is the 70th percentile of all heights for people your age. Which of the following is a correct interpretation of this information?
Your height is the same as about 70% of all other people your age.
Your height is the same as or higher than about 70% of all other people your age.
Your score height is lower than approximately 70% of all other people your age.
70% of all people your age are taller than you.
Given the data set: 1, 2, 3, 6, 9, 11, 45, 102, calculate the percentile rank for 11.
70th percentile
62.5th percentile
72.5th percentile
75th percentile
Here are the weights (in pounds) of 10 puppies: 4 4 5 7 8 8 8 10 12 13 What is the percentile rank of a 5 pound puppy?
30%
20th percentile
70%
30th percentile
What is the purpose of z-scores?
to describe the exact location of a score within a distribution
to find the mean of the distribution
to describe the shape of the distribution
to find the standard deviation of the distribution
The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.
True
False
On the Wechsler IQ test, the average IQ is 100 with a standard deviation of 15. Genius IQ would be an IQ above the average range. Which IQ's would be considered genius?
131
110
145
123
On the Wechsler IQ test, the average IQ is 100 with a standard deviation of 15. Genius IQ would be an IQ above the average range. Low incidents intellectual disability would correspond to a z-score less then -3. What would the IQ be less than?
100
-55
70
55
Find the Z-score.
Mean = 21
Standard Deviation: 1.3
x = 22
0.77
5.33
1.07
1.26
Find the Z-score.
Mean = 27
Standard Deviation: 1.4
x = 11
-11.43
7.85
-2.33
4.16
Find the z-score.
Mean = 38
Standard Deviation: 1.2
x = 42
3.33
-3
3.03
-3.33
Find the z-score.
Mean: 16
Standard Deviation: 4
x = 11
-1.25
+1.25
16
21
Find the z-score.
{15, 9, 27, 29, 37, 17, 30}
x = 14
-1.02
-1.2
1.4
2.1
