Question

A simple random sample (completely unbiased) of 1000 people indicated 90% preferred chocolate ice cream over vanilla ice cream. Calculate a 98% confidence interval for the proportion of people all around the world who prefer chocolate ice cream over vanilla ice cream. Interpret your result.

Answer #1

Let p be the proportion of people all around the world who prefer chocolate ice cream over vanilla ice cream.

Given: n=1000

**the 98% confidence interval for the proportion of people
all around the world who prefer chocolate ice cream over vanilla
ice cream is given by**

****

**the 98% confidence interval for the proportion of people
all around the world who prefer chocolate ice cream over vanilla
ice cream is**

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