The time it takes an international telephone operator to place an overseas phone call is normally distributed

Question:

The time it takes an international telephone operator to place an overseas phone call is normally distributed with mean 45 seconds and standard deviation 10 seconds.

a. What is the probability that my call will go through in less than 1 minute?

b. What is the probability that I will get through in less than 40 seconds?

c. What is the probability that I will have to wait more than 70 seconds for my call to go through?

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

Step by Step Answer:

Related Book For book-img-for-question

Complete Business Statistics

ISBN: 9780077239695

7th Edition

Authors: Amir Aczel, Jayavel Sounderpandian

See More Books

Question Posted: Jun 03, 2015 05:49 AM

See More Questions

An efficiency expert records the time it takes an assembly line worker to perform a particular task. Let E be the event "more than 5 minutes," F the event "less than 8 minutes," and G the event "less...
A variable of a population is normally distributed with mean and standard deviation . For samples of size n, fill in the blanks. Justify your answers. a. 68.26% of all possible samples have means...
A random variable is normally distributed with mean = $1500 and standard deviation = $100. Determine the standard error of the sampling distribution of the mean for simple random samples with the...
The registers values in AX and BX can be exchanged using stack operations that are: Select one: a. PUSH bx PUSH ax POP bx POP AX b. none C. PUSH ax PUSH bx POP ax POP bx d. PUSH ax POP ax PUSH bx POP...
List and discuss the four important labor market trends given in the first section of the chapter.
Complete the following table:
DJ Slick was a radio show host on WLTO-FM, based in Lexington, Kentucky. As a promotional, he announced that he would reward loyal listeners with a chance to win one hundred grand by calling the...
A credit card company has classified its customers into the following types for customer profitability analysis: 1. Applies for credit card in response to a low introductory interest rate; transfers...
Kericho Sports Club has been operating for some time now. The treasurer analysed the cash book and produced the following Receipts and Payments account for the year ended 31st Dec. 2018. Receipts...
A highway survey PI falls in a pond, so a cut off line AB = 275.12 ft is run between the tangents. In the triangle formed by points A, B, and PI, the angle at A = 1628( and at B = 2216(. The station...
Let X be a normally distributed random variable with mean = 16 and standard deviation = 3. Find P(11 < X < 20). Also find P(17 < X < 19) and P(X > 15).
The number of votes cast in favor of a controversial proposition is believed to be approximately normally distributed with mean 8,000 and standard deviation 1,000. The proposition needs at least...
The marginal cost function of producing q mountain bikes is (a) If the fixed cost in producing the bicycles is $2000, find the total cost to produce 30 bicycles. (b) If the bikes are sold for $200...
In theory and in practice, which method is better, NPV or IRR?
If a firm has to sell new shares of stock to the public to raise the financing necessary to invest in a project with a small positive NPV, should it do it?
List three policy rules that the Fed might follow. Which of these would you advocate? Why?
In the neoclassical model of business fixed investment, under what conditions will firms find it profitable to add to their capital stock?
RC Media Inc. plans to issue debt and retire stock in order to lever up its currently unlevered financing. The recapitalization proposal is to issue $20,000,000 worth of new debt with a 5.0% interest...
Figure 1839 shows the output voltage of an op-amp in response to a step input. What is the slew rate? +12 V 0 -12 V Vout 15 us FIGURE 18-39
From the choice of simple moving average, exponential smoothing, and linear regression analysis, which forecasting technique would you consider the most accurate? Why? please write it in word...
Researchers wanted to determine whether the stomach shrinks as a result of dieting. To do this, they randomly divided 23 obese patients into two groups. The 14 individuals in the experimental group...
Professor Andy Neill wanted to determine if the reaction time of people differs in their dominant hand versus their nondominant hand. To do this, he recruited 15 students. Each student was asked to...
A local golf pro wanted to compare two styles of golf club. One golf club had a graphite shaft and the other had the latest style of steel shaft. It is a common belief that graphite shafts allow a...
A pulley is 20 cm in diameter. Find the distance the load will rise if the pulley is rotated 126 0 degrees.
A&W recently hired Eric as a restaurant manager, whose effort level cannot be observed. The profits of the restaurant (before paying to Eric) is as follows. Bad economy (Prob. = 0.4) Good economy...
You have estimated the following Fama-French 3-factor model for a stock: Regression Model Outputs for Stock Returns Standard P- Coefficients t-Stat Error value Intercept 0.0106 0.0045 2.3409 0.0228...

The time it takes an international telephone operator to place an overseas phone call is normally distributed

Question:

Step by Step Answer:

X N45 10 2 a PX 60 PZ 15 5 ...View the full answer

Complete Business Statistics

Students also viewed these Statistics questions