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    Confidence interval and sample size calculation

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    Basic concepts. For each of the following, answer the question and give a short explanation of your reasoning.

    (a) A 95% confidence interval for the difference between two means is reported as (- 0.1, 1.5). What can you conclude about the results of a significance test of the null hypothesis that the population means are equal versus the two- sided alternative?

    (b) Will larger samples generally give a larger or smaller margin of error for the difference between two sample means?

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    https://brainmass.com/statistics/confidence-interval/statistics-hypothesis-testing-sample-size-vs-margin-of-error-360712

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    Basic concepts. For each of the following, answer the question and give a short explanation of your reasoning.
    a. A 95% confidence interval for ...

    Solution Summary

    Step by step method for computing confidence interval and sample size is given in the answer.

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