The Beer Institute reported that monthly consumption of beer is 1.7 gallons per person.
A random sample of 36 adults was selected. Using a standard deviation of 0.5 gallons per month per person, what is the probability that the sample mean was between 1.6 and 1.8 gallons per month per person?
A) 0.4960
B) 0.5596
C) 0.7698
D) 0.9082
Question 2
Increasing the sample size when calculating a confidence interval while keeping the confidence level constant will
A) reduce the margin of error resulting in a wider (less precise) confidence interval.
B) increase the margin of error resulting in a narrower (more precise) confidence interval.
C) reduce the margin of error resulting in a narrower (more precise) confidence interval.
D) increase the margin of error resulting in a wider (more precise) confidence interval.
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