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CHAPTER 8: CONFIDENCE INTERVAL ESTIMATES for Means and Proportions Introduction: We want to know the value of a parameter for a population. We don't know the value of this parameter for the entire
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How to fill out confidence interval for a
How to fill out confidence interval for a
01
Calculate the sample mean and sample standard deviation of the data set.
02
Determine the desired level of confidence (usually 95% or 99%).
03
Find the critical value from the t-distribution table based on the confidence level and degrees of freedom.
04
Calculate the margin of error by multiplying the critical value with the standard error (standard deviation divided by the square root of sample size).
05
Construct the confidence interval by adding and subtracting the margin of error from the sample mean.
Who needs confidence interval for a?
01
Researchers who want to estimate a population parameter with a certain level of confidence.
02
Decision makers in business who need to make informed choices based on statistical inference.
03
Students learning about hypothesis testing and confidence intervals in statistics.
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What is confidence interval for a?
Confidence interval for a is a range of values that is likely to contain the true value of a parameter.
Who is required to file confidence interval for a?
Researchers, scientists, statisticians, and analysts are required to file confidence interval for a when presenting their findings or results.
How to fill out confidence interval for a?
To fill out confidence interval for a, one needs to calculate the sample mean, standard deviation, sample size, and confidence level.
What is the purpose of confidence interval for a?
The purpose of confidence interval for a is to provide an estimate of the true value of a parameter along with a measure of the uncertainty of the estimate.
What information must be reported on confidence interval for a?
The information reported on confidence interval for a includes the point estimate, margin of error, confidence level, and the range of values.
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