A recent survey of Cambrian students asked their opinion on whether or not Cambrian should have a week-long break in the Fall semester. Of the 280 students interviewed, 215 said that there should be a break in the Fall semester. Using a 99% confidence level, complete the following steps to determine the confidence interval. Round to three decimal places. (NOTE: All areas are reported to four decimal places; all z-scores are reported to two decimal places except the two special cases listed at the bottom of the table.) Insert the following values from the question: x = n = p̂ = q̂ = CL = % What area does the confidence level represent? Calculate the following values: α/2 = zα/2 = (use the positive value, even if you calculate a negative answer) Use the appropriate formula to calculate the error to four decimal places: What are the minimum and maximum values of the confidence interval? Min: Max:
A recent survey of Cambrian students asked their opinion on whether or not Cambrian should have a week-long break in the Fall semester. Of the 280 students interviewed, 215 said that there should be a break in the Fall semester.
Using a 99% confidence level, complete the following steps to determine the confidence interval.
Round to three decimal places.
(NOTE: All areas are reported to four decimal places; all z-scores are reported to two decimal places except the two special cases listed at the bottom of the table.)
Insert the following values from the question:
x =
n =
p̂ =
q̂ =
CL = %
What area does the confidence level represent?
Calculate the following values:
α/2 =
zα/2 = (use the positive value, even if you calculate a negative answer)
Use the appropriate formula to calculate the error to four decimal places:
What are the minimum and maximum values of the confidence interval?
Min: Max:
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