poration X manufactures light bulbs. The CEO claims that an average the light bulb lasts 300 days. A res s for testing. The sampled bulbs last an average of 290 days, SD of 50 days. If the CEO's claim were true andomly selected bulbs would have an average life of no more than 290 days? 3 decimal places. Do not put a % sign.

College Algebra
1st Edition
ISBN:9781938168383
Author:Jay Abramson
Publisher:Jay Abramson
Chapter9: Sequences, Probability And Counting Theory
Section9.7: Probability
Problem 1SE: What term is used to express the likelihood of an event occurring? Are there restrictions on its...
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Corporation X manufactures light bulbs. The CEO claims that an average the light bulb lasts 300 days. A researcher randomly selects 15
bulbs for testing. The sampled bulbs last an average of 290 days, SD of 50 days. If the CEO's claim were true, what is the probability that
15 randomly selected bulbs would have an average life of no more than 290 days?
Use 3 decimal places. Do not put a % sign.
Answer:
Transcribed Image Text:Corporation X manufactures light bulbs. The CEO claims that an average the light bulb lasts 300 days. A researcher randomly selects 15 bulbs for testing. The sampled bulbs last an average of 290 days, SD of 50 days. If the CEO's claim were true, what is the probability that 15 randomly selected bulbs would have an average life of no more than 290 days? Use 3 decimal places. Do not put a % sign. Answer:
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