Complete Question:
The mean life of a large shipment of CFLs is equal to 7,500 hours. The population standard deviation is 1,000 hours. A random sample of 64 CFLs indicate a sample life of 7,250 hours.
1. State the Null and Alternative Hypothesis.
2. At the 0.05 level of significance, is there evidence that mean life is different from 7,500 hours.
3. Construct a 95% confidence interval estimate of the population mean life of the CFLs.
4. Compute the p-value and interpret its meaning.
Answer:
-2, (7005, 7450), 0.045
Explanation:
1).
H₀: mean of life shipment is 7500 hours
the hypothesis are outlined as follows
H₀: 
7500
H₁: 
7500
where, n = 64, x = 7250, 
1000 hours
Test statistics:
Our conclusion from the above result is that there is sufficient evidence to say that the mean life is different from 7500 hours
2). 95% confidence Interval for the population mean 
is
![[7250-1.96\times \frac{1000}{\sqrt{64}},7250+1.96\times \frac{1000}{\sqrt{64}} ]\\\\(7005,7495)](https://tex.z-dn.net/?f=%5B7250-1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%2C7250%2B1.96%5Ctimes%20%5Cfrac%7B1000%7D%7B%5Csqrt%7B64%7D%7D%20%5D%5C%5C%5C%5C%287005%2C7495%29)
3).
the p-value is given by
Your institution's financial aid office will usually send you a letter on when the amount is disbursed and the amount for each semester.
It is very important to use the right words in any sentence When Diana got off train there was a woman waiting for her on the platform.
In the A case of mistaken identity, we can see that as Diana got off the train, there was a woman who was waiting for her on the platform. The woman was known to have ask her if she was Diana.
In the story, Diana was suppose to be picked up by her aunt, but she was too busy and sent someone to pick her at the station.
The woman did not recognize her, as dressed very formally, with a small briefcase. Diana was very tired as a result of the journey and she happily got into the car.
See full question below
When Diana got off train there was a woman waiting for her A)below B)to C)on D)it the platform
Learn more about Sentences from
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Answer: having thatperson test drive 3 di?erent vehicles. De?ne events A1 , A2 , and A3 , byA1 = likes ...
Explanation: Hope this helps :)
Answer:
0.5
Explanation:
its of 0.5 going
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