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How do you construct a 95 confidence interval?

2:40 5:53 Suggested clip STATISTICS I How To Construct A 95% Confidence Interval For The YouTubeStart of suggested client of suggested clip STATISTICS I How To Construct A 95% Confidence Interval For The

How do you construct a confidence interval?

Identify a sample statistic. Choose the statistic (e.g, sample mean, sample proportion) that you will use to estimate a population parameter. Select a confidence level. Find the margin of error. Specify the confidence interval.

How do you construct a confidence interval for a proportion?

To calculate the confidence interval, we must find p, q. p = 0.842 is the sample proportion. This is the point estimate of the population proportion. Since the requested confidence level is CL = 0.95, then = 1 CL = 1 0.95 = 0.05 (2) = 0.025.

What is the 95% confidence interval for the population mean?

In general, you compute the 95% confidence interval for the mean with the following formula: Lower limit = M — Z.95M. Upper limit = M + Z.95M. Where Z.95 is the number of standard deviations extending from the mean of a normal distribution required to contain 0.95 of the area and M is the standard error of the mean.

How do you construct a 90 confidence interval for the population mean?

Determine the confidence level and find the appropriate z*-value. Refer to the above table. Find the sample mean. For the sample size (n). Multiply z* times. And divide that by the square root of n. Take.

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