A marketing company surveyed 200 households and found that in 120 of them the wo

Question

A marketing company surveyed 200 households and found that in 120 of them the woman made the majority of the purchasing decisions. We are interested in the population proportion of households where women make the majority of the purchasing decisions. The random variable X counts the population households where women make the majority of the purchasing decisions. To keep the level of confidence the same while decreasing the margin of error,

I would take a larger sample.

change from a 95% confidence interval to an 80% confidence interval.

increase the level of confidence.

None of the above.

Explanation / Answer

To keep the level of confidence the same while decreasing the margin of error:

I would take the larger sample.

Option A is correct.

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