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Author Question: A company installs 5,000 light bulbs. Each bulb has an average life of 500 hours with a standard ... (Read 47 times)

TFauchery

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on: Jun 16, 2021

Question 1

Let x be a continuous random variable that is normally distributed. Find the requested probability using the given mean and standard deviation.

The mean is μ = 137.0 and the standard deviation is σ = 5.3.
Find P(134.4 ≤ x ≤ 140.1).
◦ 0.0311
◦ 1.0311
◦ 0.4069
◦ 0.9069

Question 2

A company installs 5,000 light bulbs. Each bulb has an average life of 500 hours with a standard deviation of 100 hours. The life of each bulb is approximated by a normal curve. Find the number of bulbs that can be expected to last less than 500 hours.
◦ 2400 bulbs
◦ 2500 bulbs
◦ 3000 bulbs
◦ 1000 bulbs
Calculus and Its Applications ¦ Bittinger, Ellenbogen, Surgent ¦ 11th Edition
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Marked as best answer by TFauchery on Jun 16, 2021

JCABRERA33

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Reply #1 on: Jun 16, 2021
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TFauchery

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Reply 2 on: Jun 16, 2021
Thanks for the timely response, appreciate it

mcarey591

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Reply 3 on: Yesterday
Wow, this really help

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