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
Answer:
Olá, boa tarde. Caso precise, estou a disposição para a realização de trabalhos acadêmicos, entre em contato comigo, Fernanda 21994321300
Explanation:
Read directions carefully. Eliminate as many options possible, select the best answer. Answer questions you know first. Go over exam again and answer hard questions next. If you have enough time left review the questions and answers again.
The correct adjectives that can be used in the sentences will be:
- He likes participating in the games. He is so <u>enthusiastic</u>.
- Our exam yesterday was <u>perplexing</u>.
- My cousin was so <u>sanguine </u>that we slept very late last night.
- Maria was <u>thrifty </u>for buying these second-hand bags.
- Jayson uses only a metal straw to drink. He is <u>weird</u><u>.</u>
- She has grown up to be a <u>book geek</u> since she just likes to study all the time.
- Arang, our toddler neighbor, asks a lot of questions. She is so <u>inquisitive</u>.
- Jessica stays late every night reading books about philosophy. She has become more <u>geriatric </u>than her age.
- The gifts Nathan gave to his workers were <u>lavish</u>.
- Our new teacher is <u>placatory</u>.
<h3>What is an adjective?</h3>
It should be noted that adjectives are the words that are used to describe nouns or pronouns.
In this case, the adjectives used are important in turning the sentence into grammatically correct positive statements.
Learn more about adjectives on:
brainly.com/question/550822
