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
Hypothyroidism and hyperthyroidism.
Based on this line graph, the statements that are true include:
- A moderate level of conflict produces the highest level of performance.
- Teams need some conflict to do their best work.
<h3>What is a conflict?</h3>
A conflict can be defined as any form of disagreement, misunderstanding or struggle that arises between two or more parties such as members of a team, as a result of any one of the following;
In this scenario, the number of ships (performance) that were built by a team in the United States of America during each year of the war were graphically represented.
Based on the line graph, we can deduce the following statements:
- The highest level of performance was produced by a moderate level of conflict.
- In order for the teams to do their best work or demonstrate the highest level of performance, they need some conflict.
Read more on conflict here: brainly.com/question/24769299
Answer: The answer is a food web.
Explanation: A food web intersects with other plants and animals.
