CI Calculator for difference between means-examples

Confidence interval calculator for difference of means Use this calculator to determine the confidence interval for difference between means when variances are known. Confidence Interval Calculator for Difference of means   Sample 1 Sample 2 Sample Mean Sample Size Population Standard Deviation Confidence Level ($1-\alpha$) Select90%95%98%99% Calculate Results Standard Error of Diff. of Means: Z-critical …

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Confidence Interval for means when variances are known

Confidence-Interval-mean-variance-known

In this article we will discuss about the theory of confidence interval for difference between two means when population standard deviations are knonw along with the step by step procedure to construct a confidence interval for difference between two population means when the population standard deviations are known. CI for difference between two means when …

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Confidence interval for two proportions

confidence-interval-two-proportion

Confidence interval for two proportions Let $X_1$ be the observed number of individuals possessing certain attributes (number of successes) in a random sample of size $n_1$ from a large population with population proportion $p_1$ and let $X_2$ be the observed number of individuals possessing certain attributes (number of successes) in a random sample of size …

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Confidence Interval for Variance Examples

Confidence Interval for Variance Examples

Confidence Interval for Variance with Examples In this tutorial we will discuss some numerical examples to understand how to construct a confidence interval for population variance or population standard deviation. Example 1 The mean replacement time for a random sample of 12 microwaves is 8.6 years with a standard deviation of 3.6 years. Construct a …

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