ZuoTi.Pro
Question

Suppose that the length of long distance phone calls, measured in minutes, is known to have...

Suppose that the length of long distance phone calls, measured in minutes, is known to have an exponential distribution with the average length of a call equal to $14 minutes. The lambda of this distribution is .0714 Correct The probability that the length of a phone call is longer than 18 is P(x ≥ 18) = .2766 Correct The probability that the length of a phone call is shorter than 11 is P(x ≤ 11) = .5440 Correct The probability that the length of a phone call is between 12 and 15 is P(12 ≤ x ≤ 15) = Incorrect The 42nd percentile is a phone call that lasts Incorrect minutes.

math   Statistics-And-Probability   
0 0
Add a comment Improve this question Transcribed image text
Next > < Previous
Sort answers by oldest

Homework Answers

Answer #1

0 0
Add a comment
Know the answer?
Add Answer to:
Suppose that the length of long distance phone calls, measured in minutes, is known to have...
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for? Ask your own homework help question. Our experts will answer your question WITHIN MINUTES for Free.
Similar Homework Help Questions

  • Q: A study of long-distance phone calls made from General Electric revealed the length of the...

    Q: A study of long-distance phone calls made from General Electric revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of time per call was 5.5 minutes and the standard deviation was 1.3 minutes. Find the interquartile range of this distribution

  • A statistical analysis of long distance phone calls made from the headquarters of Bricks and Clicks...

    A statistical analysis of long distance phone calls made from the headquarters of Bricks and Clicks indicates the length of the calls have a mean of 300 seconds with a standard deviation of 40 seconds.  If the length of the calls follows a normal distribution, What is the probability that the length of a random phone call is less than 200 seconds? That the length of a random phone call is between 220 and 370 seconds? That the length of the...

  • Historically, evening long-distance calls phone calls from a particular city have averages 12 minutes per call....

    Historically, evening long-distance calls phone calls from a particular city have averages 12 minutes per call. In a random sample of 20 calls, the sample mean was 10.7 minutes per call with a standard deviation of 4 minutes. Does the sample indicate a change in the mean duration of long distance calls? Test the hypothesis at 10% level of significance, state the hypothesis and report your conclusion. a. estimate the p-value and show your work.

  • The length of incoming calls at the call center of a major telecommunication service provider follows...

    The length of incoming calls at the call center of a major telecommunication service provider follows a Normal distribution with an average of 7.5 minutes. If the standard deviation of the distribution is 5 minutes, answer the following questions: What is the probability that the length of an incoming call is longer than 9.5 minutes? What is the probability that the length of an incoming call is shorter than 6 minutes? What is the probability that the length of an...

  • Historically, evening long-distance phone calls from a particular city have averaged 12 minutes per call. In...

    Historically, evening long-distance phone calls from a particular city have averaged 12 minutes per call. In a random sample of 20 calls, the sample mean was 10.7 minutes per call, with a standard deviation of 4 minutes. Does the sample indicate that there has been a change in the mean duration of long distance phone calls? Test the appropriate hypothesis at the 10% level of significance. (Be sure to state the hypotheses and report your conclusion).                      [5 marks] Part B:...

  • Suppose a phone company reports that the average duration of phone calls is 1.7 minutes, with...

    Suppose a phone company reports that the average duration of phone calls is 1.7 minutes, with standard deviation of 1.4 minutes. Now suppose that you want to examine a random sample of 60 phone calls. Do you think it would be reasonable to use the Central Limit Theorem to describe the sampling distribution of the sample mean call duration? a. Yes, the CLT applies because the standard deviation is smaller than the mean. b. Yes, the CLT applies because both...

  • A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed...

    A study of long-distance phone calls made from General Electric Corporate Headquarters in Fairfield, Connecticut, revealed the length of the calls, in minutes, follows the normal probability distribution. The mean length of time per call was 3.8 minutes and the standard deviation was 0.70 minutes. Use Appendix B.3. What is the probability that calls last between 3.8 and 4.5 minutes? (Round your z value to 2 decimal places and final answer to 4 decimal places.) What is the probability that...

  • 1. The duration of 40 phone calls (in minutes) for technical support is given below 12...

    1. The duration of 40 phone calls (in minutes) for technical support is given below 12 3.3 0.5 48.7 16.7 1.2 14.8 8.2 9 5.7 11.5 17.7 3.2 20.8 7.3 8.0 0.2 51.2 3.3 5.2 12.3 24.5 13.3 7.7 13.5 4.3 13.7 10.7 18.8 15.7 3.2 28.7 16.2 23.3 9.7 4.7 6.5 0.5 45.1 5.3 Complete Table 3.5, the frequency distribution table for the call duration data Duration in Minutes 0-6 6-12 12-18 18-24 24-30 30-36 36-42 42-48 48-54 Frequency...

  • 1. The duration of 40 phone calls (in minutes) for technical support is given belovw 12...

    1. The duration of 40 phone calls (in minutes) for technical support is given belovw 12 3.3 0.5 48.7 16.7 1.2 14.8 8.2 9 11.5 17.7 3. 20.8 7.3 8.0 0.2 51.2 3.3 5.2 12.3 24.5 13.3 7.713.5 4.3 13.7 10.7 18.8 15.7 3.2 28.7 16.2 23.3 9.74.7 6.5 0.5 45.1 5.3 5.7 Complete Table 3.5, the frequency distribution table for the call duration data Duration in Minutes Frequen Percent 6-12 12 18 18-24 24-30 30-36 36-42 42-48 48 -54...

  • Problem 3-33 (Algorithmic) The time (in minutes) between telephone calls at an insurance claims office has the exponent...

    Problem 3-33 (Algorithmic) The time (in minutes) between telephone calls at an insurance claims office has the exponential probability distribution: f(z) 0.40e 0.40s for x 2 0 a. What is the mean time between telephone calls? Mean time (H)- minutes b. what is the probability of 18 seconds or less between telephone calls? (Note: 18 seconds = 0.30 minutes) If required, round your answer to four decimal places. P (x s 0.30)- c. What is the probability of 3 minute...

ADVERTISEMENT
Free Homework Help App
Download From Google Play
Scan Your Homework
to Get Instant Free Answers
Need Online Homework Help?
Ask a Question
Get Answers For Free
Most questions answered within 3 hours.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT