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When the sample size and sample standard deviation remain the same a 99 percent confidence interval for a population mean will be narrower than the 95 percent confidence interval for the mean?
Never!
What is the Z value for 91 percent confidence interval estimation?
The Z-value for a one-sided 91% confidence interval is 1.34
What is the Z value for 95 percent confidence interval estimation?
1.96
What is the z value for 75 percent confidence interval estimation?
1.15
When the sample size increase what will happen to the 95 percent confidence interval?
It becomes narrower.
What does a 95 percent confidence interval tell you about the population proportion?
There is a 95% probability that the true population proportion lies within the confidence interval.
Compute the population mean margin of error for a 99 percent confidence interval when sigma is 4 and the sample size is 36?
The mean plus or minus 2.576 (4/sqr.rt. 36)= 1.72 So take your average plus or minus 1.72 to get your confidence interval
When the sample size and sample standard deviation remain the same a 99 percent confidence interval for a population mean will be narrower than the 95 percent confidence interval for the mean?
Never!
Is a 95 percent confidence interval for a mean wider than a 99 percent confidence interval?
No, it is not. A 99% confidence interval would be wider. Best regards, NS
99 percent confidence interval Population mean 24.4 to 38.0 find the mean sample?
if the confidence interval is 24.4 to 38.0 than the average is the exact middle: 31.2, and the margin of error is 6.8
What would happen to the width of the confidence interval if the level of confidence is lowered from 95 percent to 90 percent?
decrease
What is the Z value for 91 percent confidence interval estimation?
The Z-value for a one-sided 91% confidence interval is 1.34
Difference between 95 percent and 99 percent confidence interval?
4.04%
What is confidence intervals in statistics?
The Confidence Interval is a particular type of measurement that estimates a population's parameter. Usually, a confidence interval correlates with a percentage. The certain percentage represents how many of the same type of sample will include the true mean. Therefore, we would be a certain percent confident that the interval contains the true mean.
When determining the 95 percent confidence interval for a population mean with known sigma the value of the critical value of z is equal to?
1.96
What is z value for 90 percent confidence interval?
For a two-tailed interval, they are -1.645 to 1.645
What is the Z value for 95 percent confidence interval estimation?
1.96
