The length of time, in seconds, that a computer user reads his (or her) e-mail is distributed

Question:

The length of time, in seconds, that a computer user reads his (or her) e-mail is distributed as a lognormal random variable with p = 1.8 and a2 = 4.0.

(a) What is the probability that the user reads the mail for more than 20 seconds more than a minute?

(b) What is the probability that the user reads the mail for a length of time that is equal to the mean of the underlying lognormal distribution?

Fantastic news! We've Found the answer you've been seeking!

Step by Step Answer:

Related Book For book-img-for-question

Probability & Statistics For Engineers & Scientists

ISBN: 9780130415295

7th Edition

Authors: Ronald E. Walpole, Raymond H. Myers, Sharon L. Myers, Keying

See More Books

Question Posted: Feb 03, 2011 05:08 AM

See More Questions

The following data represent the length of time (in minutes) between eruptions of Old Faithful in Yellowstone National Park. Time (minutes) .... Frequency 40-49 ........ 8 50-59 ........ 44 60-69...
A widely used technique for estimating the length of time it takes workers to produce a product is the time study. In a time study, the task to be studied is divided into measurable parts, and each...
The length of time that milk (and many other perishable substances) will stay fresh depends on the storage temperature. Suppose that milk will stay fresh for 146 hours in a refrigerator at 4C. Milk...
Canton Company makes two types of cell phones. Handy is a thin, pocket-size cell phone that is easy to carry around. Action is a palm-size phone convenient to hold while the user is talking. During...
Laser light can be focused (at best) to a spot with a radius r equal to its wavelength Î», Suppose a 1.0-W beam of green laser light (Î» = 5 x 10-7 m) forms such a spot and...
Rewrite the following sentences so that they are direct and concise. If necessary, break your answer into two sentences. a. We wanted to invite you to our special 40 percent off by-invitation-only...
7 C 4 Perform the indicated calculation.
Andruw Company had the following assets and liabilities on the dates indicated. Andruw began business on January 1, 2011, with an investment of $100,000.Instructions From an analysis of the change in...
What are the critical elements of a robust Management of Change (MoC) program in the context of PSM? Discuss how effective MoC practices contribute to minimizing risks associated with process...
KC Services provides landscaping services in Edison. Kate Chen, the owner, is concerned about the recent losses the company has incurred and is considering dropping its lawn services, which she feels...
Form the relationship between the chi-squared random variable and the gamma random variable, prove that the mean of the chi-squared random variable is v and the variance is 2v.
An employee is selected from a staff of 10 to supervise a certain project by selecting a tag at random from a box containing 10 tags numbered from 1 to 10. Find the formula for the probability...
In Chapter 8 we examined confidence intervals. Recall that to construct a confidence interval for the mean when the population standard deviation is unknown, the population must follow the normal...
Various people in the movie turn to Warren Buffett for advice and/or financial assistance, including Dick Fuld (Lehman Brothers), Lloyd Blankfein (Goldman-Sachs), Hank Paulson (Secretary of the...
Two small metallic spheres, each with a mass of m = 8.00 g, are suspended from a common point by two strings of negligible mass of length L = 59.0 cm. When the spheres have an equal amount of charge,...
A country produces good X using labor (L) and capital (K), and good Y using L and land (T). Unfortunately they suffer an earthquake in a major city and some of their capital stock is destroyed. a)...
Using python his scoring algorithm can be found here on the MDCalc website. You will need a function called priest() with the following input parameters. Sex (Gender assigned at birth) Age in years...
Let f(x)=-5 Find a formula for the general antiderivative. Then find the antiderivative F(x) that satisfies the initial condition F(3)= 8. What is the value of this antiderivative when = 0? That is,...
Solve the Bethe ansatz equations for two magnons for the case $n=0$ in the quantization condition (45.91), and write down the corresponding explicit wave functions. Data From Equation 45.91:- P1 +...
DC has unused FTC carryover from 2017 in the separate category for GC income as the result of income generated by a foreign branch. The income was foreign source general category income. In 2018 the...
(a) Determine f max for the synchronous counter of Figure 7-5(a) if t pd for each FF is 50 ns and t pd for each AND gate is 20 ns. Compare this value with f max for a MOD-16 ripple counter. (b) What...
A town that recently started a single-stream recycling program provided 60-gallon recycling bins to 25 randomly selected households and 75-gallon recycling bins to 22 randomly selected households....
An insurance company wants to know if the average speed at which men drive cars is greater than that of women drivers. The company took a random sample of 27 cars driven by men on a highway and found...
A high school counselor wanted to know if tenth-graders at her high school tend to have more free time than the twelfth-graders. She took random samples of 25 tenth-graders and 23 twelfth-graders....
The following financial information is given. Year 1 Year 2 Book value of assets $18,000 $26,000 Market value of equity 18,000 60,000 12 months ended Year 1 12 months ended Year 2 Sales $1,000 $1,300...
Purple Corporation is undergoing financial difficulty and planning to liquidate its assets. Current ratio is currently at 1.5x. Purple Corp. current liabilities is 500,000; non-current liabilities of...
Amor Co. is undergoing financial difficulty and the shareholders decided to liquidate the company. The company reported cash of P65,000 and building valued at P875,000. They owe P560,000 to various...

The length of time, in seconds, that a computer user reads his (or her) e-mail is distributed

Question:

Step by Step Answer:

Let X be the length of time in seconds Then Y lnX follows a no...View the full answer

Probability & Statistics For Engineers & Scientists

Students also viewed these Statistics questions