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The population consists of the credit card balances of all families in Oxford. The population mean isunknown. The population standard deviation is unknown. A sample

The population consists of the credit card balances of all families in Oxford. The population mean isunknown. The population standard deviation is unknown.A sample of 17 families is taken. The sampleaverage is $5900 and the sample standard deviation is $3058. Find:

(a) 90% confidence interval and the associated margin of error.

(b) 95% confidence interval and the associated margin of error.

(c) 99% confidence interval and the associated margin of error.

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