Guarantees. The average lifetime for a car battery is 170 weeks, with a standard deviation of 10 weeks. If the company guarantees the battery for 3 years, what percentage of the batteries sold would be expected to be returned before the end of the warranty period? Assume a normal distribution .
Guarantees. The average lifetime for a car battery is 170 weeks, with a standard deviation of 10 weeks. If the company guarantees the battery for 3 years, what percentage of the batteries sold would be expected to be returned before the end of the warranty period? Assume a normal distribution .
Solution Summary: The author calculates the percentage of batteries expected to be returned before the end of the warranty period of 3 years.
Guarantees. The average lifetime for a car battery is
170
weeks, with a standard deviation of
10
weeks. If the company guarantees the battery for
3
years, what percentage of the batteries sold would be expected to be returned before the end of the warranty period? Assume a normal distribution.
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.
Mathematics with Applications In the Management, Natural, and Social Sciences (12th Edition)
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