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To find the sample size for a confidence interval, use the formula: n=((z^2)*qp)/(e^2) This is if the standard deviation is known. Create an account Table of Contents. Sample Size Definition;
The following 95 confidence interval formula can be used to calculate confidence intervals for a population proportion: This is the equation to use when calculating CI for the population proportion.
A confidence interval is the point estimate +/- the margin of error; the point estimate is the value of a sample statistic, which is used as an estimate of a population parameter; and the margin ...
A confidence interval with {eq}p\% {/eq} confidence level means that {eq}p\% {/eq} of confidence intervals computed at this level contain the actual value of the parameter.
Prediction intervals represent the uncertainty in values of the dependent variable estimated using the regression equation. Calculating the interval requires first determining the parameters of ...
Question: If n=15, and alpha =0.05 what is the constant used in the confidence interval formula? If n=15, and alpha =0.05 what is the constant used in the confidence interval formula? There’s just one step to solve this.
Question: Interpret a Confidence Interval: A center producing standardized exams for certifications wants to better understand its Six-Sigma certification exam. They were only able to access a small sample of their scores, so they used the confidence interval formula with 90% confidence and obtained the values: 57 and 81. a)Interpret these ...
Use the Confidence Interval formula above and calculate the 95% confidence interval for any population mean of your choice. Write down (invent) the sample size (be sure it is 30 or above), the sample mean, and the sample standard deviation. Then, calculate the confidence interval.
Therefore, the confidence interval is 98.04 - 101.96. In other words, the researcher can conclude that there is a 95% chance that the population mean is between 98.04 and 101.96.
Our expert help has broken down your problem into an easy-to-learn solution you can count on. Question: Consider a normal population distribution with the value of σ known. (a) What is the confidence level for the interval x ± 2.88σ/ n ? (Round your answer to one decimal place.) Consider a normal population distribution with the value of σ ...