Question

From a population that is not normally distributed and whose standard deviation is not known, a...

From a population that is not normally distributed and whose standard deviation is not known, a sample of 6 items is selected to develop an interval estimate for the mean of the population (μ). Multiple Choice b. The normal distribution can be used. a. The t distribution with 6 degrees of freedom must be used. d. The sample size must be increased. c. The t distribution with 5 degrees of freedom must be used.

THE ANSWER IS NOT C) T DISTRIBUTION WITH 5 DEGREES OF FREEDOM MUST BE USED

Homework Answers

Answer #1

Answer :d. The sample size must be increased.
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A random sample of size n has been selected from a normally distributed population whose standard...
A random sample of size n has been selected from a normally distributed population whose standard deviation is σ. In hypothesis testing for the population mean, the t-test should be used instead of the z-test if: A. n>30 and σ is unknown B. n<30 and σ is known C. both A and B are true D. both A and B are false
a. If the confidence interval for the standard deviation is between 9 and 16 then the...
a. If the confidence interval for the standard deviation is between 9 and 16 then the confidence interval for a variance will be between 81 and 256 9 and 16 3 and 4 -3 and -4 b. In a study of size 8 where the variance is unknown, and the population is normally distributed, the distribution that should be used to calculate confidence intervals is a normal distribution a t distribution with 7 degrees of freedom a t distribution with...
Suppose that a population is known to be normally distributed with μ = 2,400 and σ...
Suppose that a population is known to be normally distributed with μ = 2,400 and σ = 220. If a random sample of size n = 8 is​ selected, calculate the probability that the sample mean will exceed 2,500.
A random sample of 125 items is drawn from a population whose standard deviation is known...
A random sample of 125 items is drawn from a population whose standard deviation is known to be σ = 30. The sample mean is  x¯ = 860. (a) Construct an interval estimate for μ with 95 percent confidence. (Round your answers to 1 decimal place.)   The 95% confidence interval is from _________ to __________ (b) Construct an interval estimate for μ with 95 percent confidence, assuming that σ = 60. (Round your answers to 1 decimal place.)   The 95% confidence...
Suppose that a population is known to be normally distributed with μ =2,300 and σ=250. If...
Suppose that a population is known to be normally distributed with μ =2,300 and σ=250. If a random sample of size n =8 is​ selected, calculate the probability that the sample mean will exceed 2,400.
A sample of size 234, taken from a normally distributed population whose standard deviation is known...
A sample of size 234, taken from a normally distributed population whose standard deviation is known to be 5.70, has a sample mean of 75.54. Suppose that we have adopted the null hypothesis that the actual population mean is greater than or equal to 76, that is, H0 is that μ ≥ 76 and we want to test the alternative hypothesis, H1, that μ < 76, with level of significance α = 0.1. a) What type of test would be...
A simple random sample of size n is drawn from a population that is normally distributed....
A simple random sample of size n is drawn from a population that is normally distributed. The sample​ mean, x, is found to be 113, and the sample standard deviation, s, is found to be 10. ​(a) Construct a 90​% confidence interval about μ if the sample​ size, n, is 22. ​(b) Construct a 90​% confidence interval about μ if the sample​ size, n, is 15. ​(c) Construct an 80​% confidence interval about μ if the sample​ size, n, is...
A sample of size 194, taken from a normally distributed population whose standard deviation is known...
A sample of size 194, taken from a normally distributed population whose standard deviation is known to be 9.50, has a sample mean of 91.34. Suppose that we have adopted the null hypothesis that the actual population mean is greater than or equal to 93, that is, H0 is that μ ≥ 93 and we want to test the alternative hypothesis, H1, that μ < 93, with level of significance α = 0.05. a) What type of test would be...
A simple random sample of size 11 is drawn from a normal population whose standard deviation...
A simple random sample of size 11 is drawn from a normal population whose standard deviation is σ=1.8. The sample mean is ¯x=26.8. a.) Construct a 85% confidence level for μ. (Round answers to two decimal place.) margin of error: lower limit: upper limit: b.) If the population were not normally distributed, what conditions would need to be met? (Select all that apply.) the population needs to be uniformly distributed σ is unknown simple random sample large enough sample size...
A random sample of 24 items is drawn from a population whose standard deviation is unknown....
A random sample of 24 items is drawn from a population whose standard deviation is unknown. The sample mean is x¯ = 870 and the sample standard deviation is s = 25. Use Appendix D to find the values of Student’s t. (a) Construct an interval estimate of μ with 98% confidence. (Round your answers to 3 decimal places.) The 98% confidence interval is from to (b) Construct an interval estimate of μ with 98% confidence, assuming that s =...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT