Question

you randomly sample 16 beers snd find an average alcohol of 4.23% with a standard deviation...

you randomly sample 16 beers snd find an average alcohol of 4.23% with a standard deviation for these beers of 1.25%. assume that alcohol content is normally distributed.

a. find a 90% confidence interval for the true average alcohol percentage of their beers
b. suppose you randomly sample a 17th beer. provide 95% prediction interval for the alcohol content of this beer
c. provide a 95% confidence interval for the true variance of the alcohol content of their beers
Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

a)

90% confidence interval of mean =3.682 , 4.778

b)

c)

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of...
The annual earnings of 13 randomly selected computer software engineers have a sample standard deviation of $ 3660. Assume the sample is from a normally distributed population. Construct a confidence interval for the population variance sigma squared and the population standard deviation sigma. Use a 90 % level of confidence. Interpret the results.
16 observations are randomly chosen from a normally distributed population, with a known standard deviation of...
16 observations are randomly chosen from a normally distributed population, with a known standard deviation of 16 and a sample mean of 144. What is the upper bound of a 99% confidence Interval? Answer choices: 154.3 153.3 151.8 146.6
3. For another machine part with standard deviation of .01 mm, how large of a sample...
3. For another machine part with standard deviation of .01 mm, how large of a sample would be necessary to estimate the mean within 0.001 mm at a confidence level of 99%.( 4. A sample of 100 people found that 56 of them intend to vote for a particular candidate. a. Find the 95% confidence interval of the true percentage who intend to vote for the candidate. b. Based upon the above survey, what is the probability that the candidate...
1. Consider a normally distributed population with a standard deviation of 64. If a random sample...
1. Consider a normally distributed population with a standard deviation of 64. If a random sample of 90 from the population produces a sample mean of 250, construct a 95% confidence interval for the true mean of the population. 2.A psychologist is studying learning in rats (to run a maze). She has a sample of 40 rats and their mean time to run the maze if 5 minutes with a standard deviation of 1. Estimate the average time to run...
50 Observations are randomly selected from a normally distributed population with a population standard deviation of...
50 Observations are randomly selected from a normally distributed population with a population standard deviation of 25 and a sample mean of 175. Find a 95% confidence interval for the mean.
Find the 90% confidence interval for the variance and standard deviation for the lifetimes of inexpensive...
Find the 90% confidence interval for the variance and standard deviation for the lifetimes of inexpensive wristwatches if a sample of 24 watches has a standard deviation of 4.8 months. Assume the variable is normally distributed.
A store takes a random sample of 16 sales. The average sale for the sample is...
A store takes a random sample of 16 sales. The average sale for the sample is $2310 with a standard deviation of $148. Assume that sales are distributed normally. A. Test the hypothesis that the sample mean is different from $2100? B. Would the conclusion in a change if alpha= .1? C. Construct a 95% confidence interval for the population mean?   
A researcher wishes to estimate the average blood alcohol concentration​ (BAC) for drivers involved in fatal...
A researcher wishes to estimate the average blood alcohol concentration​ (BAC) for drivers involved in fatal accidents who are found to have positive BAC values. He randomly selects records from 51 such drivers in 2009 and determines the sample mean BAC to be 0.16 ​g/dL with a standard deviation of 0.060 ​g/dL. Complete parts​ (a) through​ (c) below. ​(a) A histogram of blood alcohol concentrations in fatal accidents shows that BACs are highly skewed right. Explain why a large sample...
Of the total, 100 businesses were randomly extracted. The average after-tax benefit of the sample is...
Of the total, 100 businesses were randomly extracted. The average after-tax benefit of the sample is $80,000; Assume the parent standard deviation is $15,000. Obtain a 95% confidence interval for the average tax return of the population business. And explain why the confidence interval formula can be used in the above issues even if the population is not necessarily normally distributed.
To determine student performance on a national test, a sample of 16 students is given the...
To determine student performance on a national test, a sample of 16 students is given the test. The average for the sample was 493 with a sample standard deviation of 56. Assume performance on the test is usually normally distributed, find a 90% confidence interval for the mean of the test.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT