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Consider the following hypothesis test:
Ho: μ ≥ 40
Ha: μ < 40
A sample of 49 provides a sample mean of 38 and a sample standard deviation of 7.
a. Determine the standard error of the mean.
b. Compute the value of the test statistic.
c. Determine the p-value; and at 95% confidence, test the above hypotheses.
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How much do typical employee and his or her family spends per year on dental expenses? Sample of 45 employee reveals mean amount spend last year was $1,820, with standard deviation of $ 660.
A coin is flipped e times and heads (h) or tails (t) are recorded:
how many chocolate chip cookies will he need to sample to estimate the mean to within 2, what is a 99% confidence interval for the average number of chips per cookie?
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Describe the sampling distribution of the sample proportion
For a standard normal curve, find the z-score that separates the bottom 90% from the top 10%.
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