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3 years ago

LINKS AND RIDICULOUS ANSWERS WILL BE REPORTED! CORRECT ANSWER WILL BE MARKED BRAINLIEST

Mathematics

1 answer:

asambeis [7]3 years ago

4 0

Answer:

6.7 minutes

Step-by-step explanation:

117 miles per hour

117/60 = 1.95 (this is how fast he travels per minute)

13/1.95 = 6.66666666667 minutes which is

= 6.7 to the nearest tenth.

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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.

To find : How many commuters must be randomly selected to estimate the mean driving time of Chicago commuters?

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