Question

John's answering machine receives about 51 telephone calls between 8 a.m. and 8 p.m. Let X...

John's answering machine receives about 51 telephone calls between 8 a.m. and 8 p.m. Let X = the number of phone calls received between 1:00 p.m. to 5 p.m. What is the standard deviation of X?

Math   Statistics-And-Probability   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

0 0
Know the answer?
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
Similar Questions
John's answering machine receives about 26 telephone calls between 8 a.m. and 10 a.m. What is...
John's answering machine receives about 26 telephone calls between 8 a.m. and 10 a.m. What is the probability that John receives at least one phone calls between 9:30 am and 10:10 am?
Hillary's answering machine receives about 10 telephone calls between 8 a.m. and 10 a.m. What is...
Hillary's answering machine receives about 10 telephone calls between 8 a.m. and 10 a.m. What is the probability that Hillary receives exactly one phone call between 9:00 am and 9:15 am?
Quiz 4. John's answering machine receives about 7 telephone calls between 8 a.m. and 10 a.m....
Quiz 4. John's answering machine receives about 7 telephone calls between 8 a.m. and 10 a.m. What is the probability that John receives exactly one phone call between 9:00 am and 9:15 am? 5. Bus waiting time is uniformly distributed with the shortest and the longest waiting times being 9 and 21 minutes respectively. What is the standard deviation of the average waiting time of 46 passenger 6. The amount of time spouses shop for anniversary cards can be modeled...
A​ toll-free phone number is available from 9 a.m. to 9 p.m. for your customers to...
A​ toll-free phone number is available from 9 a.m. to 9 p.m. for your customers to register complaints about a product purchased from your company. Past history indicates that an average of 0.3 calls are received per minute. Complete parts​ (a) through​ (d). a. What properties must be true about the situation described here in order to use the Poisson distribution to calculate probabilities concerning the number of phone calls received in a? 1-minute period? Select all the assumptions for...
A switchboard at some company receives calls following a probability distribution shown below where the number...
A switchboard at some company receives calls following a probability distribution shown below where the number of calls and the probability of receiving those calls are recorded. x 0 1 2 3 4 5 6 7 8 P(x) 0.04 0.05 0.15 0.02 0.28 0.03 0.20 0.11 0.12 x 0 1 2 3 4 5 6 7 8 p(x) 0.04 0.05 0.15 0.02 0.28 0.03 0.20 0.11 0.12 a. Calculate the probability that the switchboard receives: i. Less than four calls....
A random sample of 14 evenings (6 to 9 P.M.) at the O’Sullivan household showed the...
A random sample of 14 evenings (6 to 9 P.M.) at the O’Sullivan household showed the family received an average of = 5.2 solicitation phone calls each evening. The sample standard deviation was s = 1.9. Find a 95% confidence interval for the population mean number of solicitation calls this family receives each night. a). Calculate the Margin of Error for this scenario. [6] b). Calculate the 95% confidence interval. [8] c). What are the conditions necessary for this process.
Suppose that the number of persons using an ATM in any given hour between 9 a.m....
Suppose that the number of persons using an ATM in any given hour between 9 a.m. and 5 p.m. can be modeled by a Poisson distribution with a mean of 12. In this case, the “unit of measure” is an hour of time during the business day. Let X be the number of periods who use the ATM in a given hour. What is the standard deviation of the random variable X, i.e., the standard deviation of this Poisson distribution?...
The number of calls received by an office on Monday morning between 8:00 AM and 9:00...
The number of calls received by an office on Monday morning between 8:00 AM and 9:00 AM has a mean of 5. Calculate the probability of getting no more than 1 call between eight and nine in the morning. Round your answer to four decimal places.
The emergency telephone (911) center in a large city receives an average of 120 calls per...
The emergency telephone (911) center in a large city receives an average of 120 calls per hour during a typical day. On average, each call requires about 121 seconds for a dispatcher to receive the emergency call, determine the nature and location of the problem, and send the required individuals (police, firefighters, or ambulance) to the scene. The center is currently staffed by 4 dispatchers a shift but must have an adequate number of dispatchers on duty and it has...
ilson Products Incorporated is interested in the relationship between number of sales calls (x) made by...
ilson Products Incorporated is interested in the relationship between number of sales calls (x) made by their sales reps and the number of products sold (y). A random sample of 10 sales reps showed the following calls and sales over a one-month period. (1.) Build the regression equation for this data set. (2.) Predict the amount of product sold if 11 sales calls are made. x y Sales Calls Products Sold 12 9 Given: 9 7 r = .904 14...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT