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
Newton’s first law of motion states that ever object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force is the definition of Newton’s first law of motion
The two key principles that form the foundation for an ethical sales presentation are:
- To uncover needs.
- To solve problems.
<h3>What is a
sales presentation?</h3>
A sales presentation is an act that involves the process of speaking to customers and potential customers, so as to formally share and explain information about a product, especially for the purpose of proffering a solution to a particular problem.
This ultimately implies that, the two key principles that form the foundation for an ethical sales presentation are:
- To uncover needs.
- To solve problems.
Read more on sales presentation here: brainly.com/question/6890728
#SPJ1
Answer:
0
Explanation:
Use pythagorean theorem, and get that 40 is the height (50-10), while half of the cable is 40, so 0 is the distance.
Answer:
compare what he has found with other things that are known about the physical world
Explanation:
Good luck <3
