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7(a). Which of these confidence intervals would be the narrowest ? -A 90% confidence interval for population mean, based on a sample of size 300.

7(a). Which of these confidence intervals would be the narrowest?

-A 90% confidence interval for population mean, based on a sample of size 300.

-A 90% confidence interval for population mean, based on a sample of size 100.

7(b). Which of these confidence intervals would be the widest?

-A 90% confidence interval for population mean, based on a sample of size 300.

-A 95% confidence interval for population mean, based on a sample of size 100.

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