Question

A statistics practitioner calculated the mean and standard deviation from a sample of 51. The sample...

A statistics practitioner calculated the mean and standard deviation from a sample of 51. The sample mean is 120 and the sample standard deviation is 15. Estimate the population mean with 80% confidence.

[115.78, 124.22]

[117.27, 122.73]

[100.52, 139.48]

[116.48, 123.52]

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

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
A statistics practitioner took a random sample of 80 observations from a population with a standard...
A statistics practitioner took a random sample of 80 observations from a population with a standard deviation of 25 and compute the sample mean to be 100. (a) Estimate the population mean confidence interval with 90% confidence level, 95% confidence level and 99% confidence level. (b) Describe the effect of increasing the confidence level on the confidence interval. (c) At 99% confidence level, if the population standard deviation is reduced to 16, will the confidence interval be wider or narrower?
A statistics practitioner took a random sample of 40 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 40 observations from a population whose standard deviation is 15 and compute the sample mean to be 50. The 90% confidence interval for the mean will be between __________ and __________.
A statistics practitioner took a random sample of 56 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 56 observations from a population whose standard deviation is 29 and computed the sample mean to be 97. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 95% confidence, changing the population standard deviation to 58; Confidence Interval =...
A statistics practitioner took a random sample of 57 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 57 observations from a population whose standard deviation is 29 and computed the sample mean to be 97. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 95% confidence, changing the population standard deviation to 48; Confidence Interval =...
A statistics practitioner took a random sample of 56 observations from a population whose standard deviation...
A statistics practitioner took a random sample of 56 observations from a population whose standard deviation is 32 and computed the sample mean to be 102. Note: For each confidence interval, enter your answer in the form (LCL, UCL). You must include the parentheses and the comma between the confidence limits. A. Estimate the population mean with 95% confidence. Confidence Interval = B. Estimate the population mean with 90% confidence. Confidence Interval = C. Estimate the population mean with 99%...
Suppose scores exams in statistics with an unknown population mean and a sample standard deviation of...
Suppose scores exams in statistics with an unknown population mean and a sample standard deviation of 2 points. A random sample of 16 scores is taken and gives a sample mean. (sample mean score) of 8. Find the confidence interval estimate for the population mean test score ( the mean score of all tests). Find a 90% confidence interval for the true (population) mean of statistics test scores.
A random sample of 51 charge sales showed a sample standard deviation of $47. A 90%...
A random sample of 51 charge sales showed a sample standard deviation of $47. A 90% confidence interval estimate of the population standard deviation is (Round your answers to 2 decimal places.)
A simple random sample of 70 items resulted in a sample mean of 80. The population standard deviation is
A simple random sample of 70 items resulted in a sample mean of 80. The population standard deviation isσ = 15.(a)Compute the 95% confidence interval for the population mean. (Round your answers to two decimal places.)to(b)Assume that the same sample mean was obtained from a sample of 140 items. Provide a 95% confidence interval for the population mean. (Round your answers to two decimal places.)to(c)What is the effect of a larger sample size on the interval estimate?A larger sample size...
A sample of households shows the following statistics about household income: Mean: 60000 Standard Deviation: 5000...
A sample of households shows the following statistics about household income: Mean: 60000 Standard Deviation: 5000 Sample Size: 10 At the 80% confidence level, what is the upper limit for the confidence interval formed with these values? Round to 2 decimal places.
The 99% confidence interval for the mean, calculated from a sample is 2.05944 ≤ μ ≤...
The 99% confidence interval for the mean, calculated from a sample is 2.05944 ≤ μ ≤ 3.94056 . Determine the sample mean X ¯ = . Assuming that the data is normally distributed with the population standard deviation =2, determine the size of the sample n =
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT