
Normal Probabilities Using a Table
Authored by Anthony Clark
Mathematics
12th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Find the area under the standard normal curve where z < 2.42 .
.008
.992
.301
.862
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A franchisor records monthly profits (in £) from each of its 180 franchisees. Sales for the most recent month are given in the table below. To advertise its franchise the franchisor would lke to publish probabilities that a franchisee can hope to earn for each of several profit brackets. To calculate these probabilities, the franchisor models profits as following a normal distribution. Is the normal distribution an appropriate model to use, given the data in the table? [From the raw data, the sample mean profit is £1843.17, and the sample standard deviation is £643.63.] To give a solution, ANSWER the following questions. The null and alternative hypotheses are:
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Find the area under the standard normal distribution curve.
Between z = 0 and z = 1.77
5.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Find the area under the standard normal distribution curve.
To the right of z = 0.37
6.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Find the area under the standard normal distribution curve.
To the left of z = −0.75
7.
FILL IN THE BLANK QUESTION
1 min • 1 pt
Find the probabilities for each, using the standard normal distribution.
P(0 < z < 0.95)
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