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Hypothesis Testing of Variance & Sample size

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Question 5

Use the traditional method to test the given hypothesis. Assume that the population is normally distributed and that the sample has been randomly selected
A machine dispenses a liquid drug into bottles in such a way that the standard deviation of the contents is 81 milliliters. A new machine is tested on a sample of 24 containers and the standard deviation for this group is found to be 26 milliliters. At the 0.05 level of significance, test the claim that the amounts dispensed by the new machine have a smaller standard deviation.

Question 6

Use the given data to find the minimum sample size required to estimate the population proportion.
margin of error: 0.003, level of confidence: 94%, p and q are unknown

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Solution Summary

The solution provides step by step method for the calculation of testing of hypothesis of variance and sample size. Formula for the calculation and Interpretations of the results are also included. Interactive excel sheet is included. The user can edit the inputs and obtain the complete results for a new set of data.