Question

If the variance of the water temperature in a lake is 25° , how many days...

If the variance of the water temperature in a lake is

25°

, how many days should the researcher select to measure the temperature to estimate the true mean within

3°

with

99%

confidence? Round the intermediate calculations to two decimal places and round up your final answer to the next whole number.

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.005))" to find the Z-value.

Round to the next whole number.

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