Round 3.7257 to 2 decimal places

Mathematics

1 answer:

Angelina_Jolie [31]3 years ago

7 0

3.73

If the number is 5 or higher you round up.

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Hi

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another way to do it
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How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters? We want 95% confidence that

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61 commuters must be randomly selected to estimate the mean driving time of Chicago commuters.

Step-by-step explanation:

Given : We want 95% confidence that the sample mean is within 3 minutes of the population mean, and the population standard deviation is known to be 12 minutes.

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At 95% confidence the z-value is z=1.96

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