Answered: Question 18 Tiki torches are found to…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Question 18

Tiki torches are found to last an average of 360 minutes and be normally distributed. The standard deviation of tiki torch light duration is 32 minutes. What percent of tiki torches last longer than 416 minutes?

Group of answer choices

95.99%

4.23%

3.92%

4.01%

Question 19

Group of answer choices

88.49%

98.78%

88.22%

10.56%

Question 20

Group of answer choices

97.72%

3.62%

2.28%

4.79%

Features Features Normal distribution is characterized by two parameters, mean (µ) and standard deviation (σ). When graphed, the mean represents the center of the bell curve and the graph is perfectly symmetric about the center. The mean, median, and mode are all equal for a normal distribution. The standard deviation measures the data's spread from the center. The higher the standard deviation, the more the data is spread out and the flatter the bell curve looks. Variance is another commonly used measure of the spread of the distribution and is equal to the square of the standard deviation.

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