FOR EACH PROBLEM BELOW, a) formulate the null and alternative hypotheses; b) Determine what test statist. to use; c) Calculate the test statistic value

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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FOR EACH PROBLEM BELOW, a) formulate the null and alternative hypotheses; b) Determine what test statist. to use; c) Calculate the test statistic value.
4. XY company claims that their lightbulb can last for 6,0oo hours. 24 samples were tested, and the
average lifespan is 5600 hours with a standard deviation of 300. Is there a convincing evidence that
the XY lightbulbs cannot last for 6,000 hours?
Transcribed Image Text:4. XY company claims that their lightbulb can last for 6,0oo hours. 24 samples were tested, and the average lifespan is 5600 hours with a standard deviation of 300. Is there a convincing evidence that the XY lightbulbs cannot last for 6,000 hours?
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