1 students take an average of 45 minutes and standard

Reference no: EM13606671

1. Students take an average of 45 minutes and standard deviation of 8 minutes to complete a certain statistics test. If a student is selected at random, what is the probability that the student takes more than 56 minutes to complete the test?

2. A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get more than 75 mpg?

3. A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get between 65 and 75 mpg?

4. Students take an average of 45 minutes and standard deviation of 8 minutes to complete a certain statistics test. If a student is selected at random, what is the probability that the student takes between 40 minutes and 45 minutes to complete

the test?

5. A company advertises that its light bulbs last an average of 500 days and standard deviation of 100. If you purchase one of the light bulbs, what is the probability it will last more than one year but less than 2 years? (between 365 and 730 days)

6. Students take an average of 45 minutes and standard deviation of 8 minutes to complete a certain statistics test. If a student is selected at random, what is the probability that the student takes less than 56 minutes to complete the test?

7. A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get less than 75 mpg?

8. Students take an average of 45 minutes and standard deviation of 8 minutes to complete a certain statistics test. If a student is selected at random, what is the probability that the student takes less than 40 minutes to complete the test?

9. A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get more than 50 mpg?

10. A new car that runs on electricity and gasoline is advertised as getting 65 mpg with a standard deviation of 6.9. If you test drive a car, what is the probability that it will get less than 50 mpg?

Reference no: EM13606671

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