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Second opinion] The scores on...

Second opinion] The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination.

448, 478, 511, 560, 569, 609, 646

Send data

to Excel

Find a

90% confidence interval for the population standard deviation. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)

448, 478, 511, 560, 569, 609, 646

Send data

to Excel

Find a

90% confidence interval for the population standard deviation. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. (If necessary, consult a list of formulas.)

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