The average score on a math test is 75 with a standard deviation of 8. What is the probability that a randomly selected test has a score of 90 or higher? P(z The life of a gas grill is 3.5 years with a standard deviation 0.35 years. What is the probability that the grill will last less than 3 years? P(z Ambulance response times average 7.5 minutes with a standard deviation of 2.5. What is the probability that an ambulance will respond within 6 to 8 minutes.

A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Normal Distribution
Assume that the distributions for the
following scenarios are normal. Use the
normal standard table to find the following
probabilities. Round z-scores to the nearest
hundredth.
1. The average score on a math test is 75
with a standard deviation of 8. What is
the probability that a randomly
selected test has a score of 90 or
higher?
P(z
2. The life of a gas grill is 3.5 years with a
standard deviation 0.35 years. What is
the probability that the grill will last
less than 3 years?
P(z
3. Ambulance response times average 7.5
minutes with a standard deviation of
2.5. What is the probability that an
ambulance will respond within 6 to 8
minutes.
P(
Check
Transcribed Image Text:Normal Distribution Assume that the distributions for the following scenarios are normal. Use the normal standard table to find the following probabilities. Round z-scores to the nearest hundredth. 1. The average score on a math test is 75 with a standard deviation of 8. What is the probability that a randomly selected test has a score of 90 or higher? P(z 2. The life of a gas grill is 3.5 years with a standard deviation 0.35 years. What is the probability that the grill will last less than 3 years? P(z 3. Ambulance response times average 7.5 minutes with a standard deviation of 2.5. What is the probability that an ambulance will respond within 6 to 8 minutes. P( Check
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