2. We can expect 15 x % of the batteries to last less than 30 months. 3. We can expect 16 v % of the batteries to last longer than 42 months. 4. We can expect 49.865 x % of the batteries to last between 30 and 39 months. 5. We can expect 15.865 % of the batteries to last between 42 and 48 months.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
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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VSC
Empirical Rule
Use the Empirical Rule to find the following probabilities. It is suggested that you draw a normal curve, label the z-values for 1, 2,
and 3 standard deviations from the mean, and write in the probabilities between each standard deviation before attempting to
answer the questions.
The average life-span of a True Test auto battery is 39 months with a standard deviation of 3 months. Assume a normal
distribution.
1. We can expect 95% of the batteries to last between
33
V and 45
V months.
2. We can expect
15
x % of the batteries to last less than 30 months.
3. We can expect 16
v % of the batteries to last longer than 42 months.
4. We can expect 49.865
x % of the batteries to last between 30 and 39 months.
5. We can expect
15.865
x % of the batteries to last between 42 and 48 months.
Normal Distributions
According to the College Board, the probability that a student forgets to bring their ID with them when they take their SAT is 3%. A
random samnle of 500 students was selected Let n-bat be the nronortion of the sampnlewhich forant their ID
A+
e here to search
Transcribed Image Text:VSC Empirical Rule Use the Empirical Rule to find the following probabilities. It is suggested that you draw a normal curve, label the z-values for 1, 2, and 3 standard deviations from the mean, and write in the probabilities between each standard deviation before attempting to answer the questions. The average life-span of a True Test auto battery is 39 months with a standard deviation of 3 months. Assume a normal distribution. 1. We can expect 95% of the batteries to last between 33 V and 45 V months. 2. We can expect 15 x % of the batteries to last less than 30 months. 3. We can expect 16 v % of the batteries to last longer than 42 months. 4. We can expect 49.865 x % of the batteries to last between 30 and 39 months. 5. We can expect 15.865 x % of the batteries to last between 42 and 48 months. Normal Distributions According to the College Board, the probability that a student forgets to bring their ID with them when they take their SAT is 3%. A random samnle of 500 students was selected Let n-bat be the nronortion of the sampnlewhich forant their ID A+ e here to search
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