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The one-sample t statistic for testing:
Ho: mu= 40 Ha: mu not equals to 40 from a sample of n = 27 observations has the value t = 2.01.
(a) What are the degrees of freedom for t?
(b) Locate the two critical values t* from the t distribution critical values table that bracket t.
(c) Between what two values does the P-value of the test fall?
(d) Is the value t = 2.01 statistically significant at the 5% level? At the 1% level?
(e) If you have software available, find the exact P-value.
Describe how you would select 6 of them to check if they do not have any defects using systematic sampling technique.
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A sample of 23 European countries found that variance of life expectancy was 7.3 years. Determine the 95% confidence interval estimate for variance of life expectancy in Europe?
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