A Survey of Shoppers Is Planned to See What Percentage

question 48

Multiple Choice

A survey of shoppers is planned to see what percentage use credit cards.Prior surveys suggest 56% of shoppers use credit cards.How many randomly selected shoppers must we survey in order to estimate the proportion of shoppers who use credit cards to within 1% with 95% confidence?

• A)6664
• B)8519
• C)9466
• D)16,338
• E)21,513

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Definitions:

P-value

The odds of seeing results from a test that are at least as extreme as the observed results, with the assumption that the null hypothesis is accurate.

Sampled Populations

Populations from which samples are drawn for the purpose of conducting research or statistical analysis.

Sample Sizes

The number of observations or items selected from a population to constitute a sample.

Confidence Interval

A confidence interval is a range of values, derived from the sample data, that is believed to contain the true population parameter with a certain level of confidence.