Lightbulbs: The lifetime of lightbulbs has a mean of 1500 hours and a standard deviation of 100 hours. A sample of 100 lightbulbs is tested. Use the Cumulative Normal Distribution Table or technology. Round your answers to four decimal places.What is the probability that the sample mean lifetime is less than 1540 hours? The probability that the sample mean lifetime is less than 1540 hours is

Lightbulbs: The lifetime of lightbulbs has a mean of 1500 hours and a standard deviation of 100 hours. A sample of 100 lightbulbs is tested. Use the Cumulative Normal Distribution Table or technology. Round your answers to four decimal places.What is the probability that the sample mean lifetime is less than 1540 hours? The probability that the sample mean lifetime is less than 1540 hours is

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section: Chapter Questions

Problem 19SGR

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Lightbulbs: The lifetime of lightbulbs has a mean of 1500 hours and a standard deviation of 100 hours. A sample of 100 lightbulbs is tested. Use the Cumulative Normal Distribution Table or technology. Round your answers to four decimal places.What is the probability that the sample mean lifetime is less than 1540 hours?

The probability that the sample mean lifetime is less than 1540 hours is

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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