Question

In: Statistics and Probability

If the confidence level is increased from 90% to 99% for a simple random sample of...

If the confidence level is increased from 90% to 99% for a simple random sample of size n, the width of the confidence interval for the mean μ will:

Question 1 options:

The answer cannot be determined from the information given.

decrease.

stay the same.

increase.

Solutions

Expert Solution

TOPIC:Relationship between the confidence level and the width of the confidence interval.


Related Solutions

A 95% confidence interval contains 5. If the confidence level is increased to 99%, will the...
A 95% confidence interval contains 5. If the confidence level is increased to 99%, will the new interval contain 5? Yes No Unable to determine
A simple random sample of 90 items from a population with  = 9 resulted in a sample...
A simple random sample of 90 items from a population with  = 9 resulted in a sample mean of 36. If required, round your answers to two decimal places. a. Provide a 90% confidence interval for the population mean.   to   b. Provide a 95% confidence interval for the population mean.   to   c. Provide a 99% confidence interval for the population mean.
You are constructing a 90% confidence interval for the difference of means from simple random samples...
You are constructing a 90% confidence interval for the difference of means from simple random samples from two independent populations. The sample sizes are = 6 and = 14. You draw dot plots of the samples to check the normality condition for two-sample t-procedures. Which of the following descriptions of those dot plots would suggest that it is safe to use t-procedures? I. The dot plot of sample 1 is roughly symmetric, while the dot plot of sample 2 is...
A simple random sample from a population with a normal distribution of 99 body temperatures has...
A simple random sample from a population with a normal distribution of 99 body temperatures has x overbarequals98.20degrees Upper F and sequals0.64degrees Upper F. Construct a 90​% confidence interval estimate of the standard deviation of body temperature of all healthy humans. LOADING... Click the icon to view the table of​ Chi-Square critical values. nothingdegrees Upper Fless thansigmaless than nothingdegrees Upper F ​(Round to two decimal places as​ needed.)
Suppose a simple random sample of 90 students from this district is drawn. What is the...
Suppose a simple random sample of 90 students from this district is drawn. What is the probability that at least half of them have either brown or green eyes? (Use technology. Round your answer to three decimal places.) brown eyes is 40%, green eyes is 20%.
Suppose a simple random sample of 90 students from this district is selected. What is the...
Suppose a simple random sample of 90 students from this district is selected. What is the probability that at least half of them have brown eyes? (Use technology. Round your answer to three decimal places.) Brown eyes is 40% I got 0.026 as my answer but the program is saying it is wrong, can someone figure out the correct answer please
A simple random sample of 90 items from a population with σ = 7 resulted in...
A simple random sample of 90 items from a population with σ = 7 resulted in a sample mean of 33. If required, round your answers to two decimal places. a. Provide a 90% confidence interval for the population mean. to b. Provide a 95% confidence interval for the population mean. to c. Provide a 99% confidence interval for the population mean.
1. If you decrease the level of confidence from 99% to 95%, the width of confidence...
1. If you decrease the level of confidence from 99% to 95%, the width of confidence interval will A. increase by 4% B. decrease by 4% C. decrease by 8% D. None of the above 2. If you wish to decrease the margin of error, you may do which one of the following: A. Increase the sample size. B. Reduce the population size. C. Decrease the level of confidence. D. Both b and c  E. Both a and c 3. In...
The random sample (3,5,6,8,9,11) is selected from a normal population. Construct a 90% confidence interval estimate...
The random sample (3,5,6,8,9,11) is selected from a normal population. Construct a 90% confidence interval estimate for the sample standard deviation.
A simple random sample of 60 items resulted in a sample mean of 90. The population...
A simple random sample of 60 items resulted in a sample mean of 90. The population standard deviation is 12. a. Compute the 95% confidence interval for the population mean (to 1 decimal). ( ? , ? ) b. Assume that the same sample mean was obtained from a sample of 120 items. Provide a 95% confidence interval for the population mean (to 2 decimals). ( ? , ? )
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT