To compute the confidence level and the sample size lets vary the confidence lev

Question

To compute the confidence level and the sample size lets vary the confidence level and the accuracy of the textbook example of the mean burn of the sample of propellants. Remember that in the textbook example if the x=51.3 n was equal to 25 propellants. = 0.05 Z_ = Zo 025 =-1.96 = 2 cm / second Let change = 0 01 , and the other variables remain the same. The new accuracy s 001 cmisec Questions 1. If you change the alpha from 0.05 to an alpha of 0.01 the confidence level limits are a. True b. False bigger? a. True 2. If you change the accuracy level from 0.1 cm/sec to 0.01 cm/sec the sample size is b. False

Explanation / Answer

a) It is false, as we decreased significance level or increase confidence level, the confidence level limits are smaller

b) Yes, as accuracy decreases, sample size get bigger

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