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Presentation
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Practice Problem
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Hard
Krystal Alleyne
FREE Resource
2 Slides • 39 Questions
1
Multiple Choice
What is the total area under the normal curve in a standard normal distribution?
1
2
3
4
2
Multiple Choice
Where can we locate the mean in the normal curve?
to the left portion
to the right portion
at the center
on the z - axis
3
Multiple Choice
Which of the following graphs shows a normal curve?
4
Multiple Choice
5
Multiple Choice
6
Multiple Choice
7
Multiple Choice
32%
8
Multiple Choice
What is half of the total area of the normal curve?
-1
0
0.5
1
9
Multiple Choice
What is the shape of a Normal Probability Distributions?
bar
bell
circle
line
10
Multiple Choice
Which part of a normal curve is asymptotic with the horizontal axis?
center
curve
tail
top
11
Multiple Choice
Under the curve, the area to the right of the mean is_________.
30%
47.72%
50%
68%
12
Multiple Choice
Which of the following parameters is the basis of the shape of the normal curve?
mean
standard deviation
variance
both mean and standard deviation
13
Multiple Choice
Which of the following does NOT belong to the group?
to the right
above
to the left
greater than
14
Multiple Choice
How many percents is the total area that corresponds to the right of 0 and to the left of 0?
25%
50%
75%
100%
15
Multiple Select
For a Normal Curve which of the following terms equal the same number?
Mean
Median
Mode
Range
Standard Deviation
16
The Empirical Rule 68%, 95%, 99.7%
68% of the data is within 1 SD of the mean above and below.
95% of the data is within 2 SD of the mean above and below.
99.7% of the data is within 3 SD of the mean above and below.
17
Multiple Choice
What percent of the data is 3 standard deviation above or below the mean?
68%
99.7%
95%
50%
18
Multiple Choice
What percent of the data is 2 standard deviation above or below the mean?
68%
99.7%
95%
50%
19
Finding Probabilities with the Empirical Rule
Use the diagram to help! Mean is 80 and the SD is 10
What percent of the data lies between 70 and 80? (0.34 or 34%)
What percent of the data lies between 90 and 110? (0.135+0.0235 = 0.1585 or 15.85%)
20
Multiple Choice
What Percent of the data lies between 70 and 90?
68%
0.68
34%
99.7%
21
Multiple Choice
What Percent of the data lies below 80?
50%
68%
34%
99.7%
22
Multiple Choice
What Percent of the data lies between 60 and 90?
50%
81.5%
68%
99.7%
23
Multiple Choice
24
Multiple Choice
25
Multiple Choice
26
Multiple Choice
In a normal distribution, the mean, median and mode are
within 1 standard deviation
very similar
within 0.1%
equal
27
Multiple Choice
If you had to guess the probability of the gray area, which would you choose?
0.2
0.4
0.6
0.8
28
Multiple Choice
Given a mean of 75 and a standard deviation of 7, what percentage of scores are between 75 and 82?
68%
81.5%
16%
34%
29
Multiple Choice
About what percent of the products last between 12 and 15 days?
30
Multiple Choice
According to the empirical rule, what percentage of data falls within 1 standard deviation of the mean?
25%
68%
95%
99.7%
31
Multiple Choice
If this is the graph of data normally distributed with a mean of 30 and a standard deviation of 5, what label (number) is written at the blue circle?
20
15
40
30
32
Multiple Choice
33
Multiple Choice
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
34
Multiple Choice
The Median is also referred to as
the 25th Percentile
the 50th Percentile
the 75th Percentile
the 100th Percentile
35
Multiple Choice
36
Multiple Choice
37
Multiple Choice
38
Multiple Choice
39
Multiple Choice
40
Multiple Choice
41
Multiple Choice
The frequency of a specific data value divided by the total number of data values in the set.
Relative Frequency
Conditional Relative Frequency
Marginal Relative Frequency
Joint Relative Frequency
What is the total area under the normal curve in a standard normal distribution?
1
2
3
4
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