Obtain the size of the current balance of a random sample

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A researcher is interested in the size of the current balance of credit card holders. To estimate this, he obtains the size of the current balance of a random sample of 25 credit card holders. A 90% confidence interval for the mean current balance of credit card holders is found to be $662.72 +or- $44.70. Which of the following would produce a confidence interval with a smaller margin of error than this 90% confidence interval?

Reference no: EM13224334

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Obtain the size of the current balance of a random sample : A researcher is interested in the size of the current balance of credit card holders. To estimate this, he obtains the size of the current balance of a random sample of 25 credit card holders. A 90% confidence interval for the mean current balance..

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