Question
a. Calculate the 95% confidence interval for the proportion of Standard type cards with rewards points and interpret the confidence interval in context. Show your
a. Calculate the 95% confidence interval for the proportion of Standard type cards with rewards points and interpret the confidence interval in context. Show your workings and write out the confidence interval using the correct notation.
b. Show that the necessary condition/s hold for this confidence interval to be valid.
c. What is the margin of error of the 95% confidence interval estimate for the proportion of
Standard type cards with rewards points?
d. Calculate the sample size required to estimate the proportion of Standard type cards with
rewards points with 95% confidence and a margin of error of 2%?
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