GCSE Statistics Normal Distribution
Quiz
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
Barbara White
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10 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Find the probability using the standard normal distribution.
P(z < 1.49)
0.9319
0.0681
0.6879
0.3121
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Find the probability using the standard normal distribution.
P(z ≥ –2.31)
0.0104
0.0087
0.9896
0.9913
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Find the probability using the standard normal distribution.
P(–2.14 < z < 0.95)
0.1170
0.0681
0.1873
0.8127
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability a randomly selected person has an IQ score greater than 120.
0.9082
0.0918
0.6293
0.3707
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. Find the probability a randomly selected person has an IQ score between 100 and 120.
0.9082
0.0918
0.4082
0.5918
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Find the z-score that has 2.68% of the distribution’s area to its right.
z = 0.9963
z = –1.93
z = –0.0037
z = 1.93
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
IQ scores are normally distributed with a mean of 100 and a standard deviation of 15. What IQ score represents the 98th percentile?
131
123
113
145
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