A type of battery-operated led lights has a known mean lifetime 8 hrs with standard deviation 0.5. It's provided that the lifetimes of these led lights are normally distributed. Without using the normalcdf(...) function, find the probability that one of these led lights, selected at random, having lifetime between 6.5 and 7 hours. (Write the answer in decimals) A type of battery-operated led lights has a known mean lifetime 8 hrs with standard deviation 0.5. It'sprovided that the lifetimes of these led lights are normally distributed. Without using the normalcdf(...)function, find the probability that one of these led lights, selected at random, having lifetime between 6.5 and7 hours.(Write the answer in decimals)

A type of battery-operated led lights has a known mean lifetime 8 hrs with standard deviation 0.5. It's provided that the lifetimes of these led lights are normally distributed. Without using the normalcdf(...) function, find the probability that one of these led lights, selected at random, having lifetime between 6.5 and 7 hours.

A type of battery-operated led lights has a known mean lifetime 8 hrs with standard deviation 0.5. It's provided that the lifetimes of these led lights are normally distributed. Without using the normalcdf(...) function, find the probability that one of these led lights, selected at random, having lifetime between 6.5 and 7 hours.

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

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 13PPS

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Question

A type of battery-operated led lights has a known mean lifetime 8 hrs with standard deviation 0.5. It's provided that the lifetimes of these led lights are normally distributed. Without using the normalcdf(...) function, find the probability that one of these led lights, selected at random, having lifetime between 6.5 and 7 hours.

(Write the answer in decimals)

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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