Question

A marketing manager must decide on the size of the survey sample to be used in order to estimate the proportion of customers who are aware of her brand. She wishes to estimate this proportion to within 10 percentage points with 88% confidence. If the manager guesses that the proportion of aware customers is roughly 30%, what is the size of the sample that must be used

Answer 1

The size of the sample that must be used is 264. The correct sample size is 264. Read below about how to arrive at the sample size.

What is the sample size that must be used?

p′ = x / n where x represents the number of successes and n represents the sample size. The variable p′ is the sample proportion and serves as the point estimate for the true population proportion.

Then, it follows that,

p= 30/10 x 88 = 264

Therefore, the correct answer is 264.

learn more about population proportion: brainly.com/question/4300488

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