Assume order service time follows a normal distribution with mean = 20 min and standard deviation 2 min. Which of the following is TRUE? 68% of the service orders take between 16 and 24 min. An order that takes 28 min is not an outlier. 68% of the service orders take between 16 and 24 min. An order that takes 28 min is an outlier. 95% of the service orders take between 16 and 24 min. An order that takes 28 min is not an outlier. 95% of the service orders take between 16 and 24 min. An order that takes 28 min is an outlier.

Assume order service time follows a normal distribution with mean = 20 min and standard deviation 2 min. Which of the following is TRUE? 68% of the service orders take between 16 and 24 min. An order that takes 28 min is not an outlier. 68% of the service orders take between 16 and 24 min. An order that takes 28 min is an outlier. 95% of the service orders take between 16 and 24 min. An order that takes 28 min is not an outlier. 95% of the service orders take between 16 and 24 min. An order that takes 28 min is an outlier.

ENGR.ECONOMIC ANALYSIS

14th Edition

ISBN:9780190931919

Author:NEWNAN

Publisher:NEWNAN

Chapter1: Making Economics Decisions

Section: Chapter Questions

Problem 1QTC

See similar textbooks

Similar questions

Suppose commute times in a large city are normally distributed and that 65.20% of commuters in this city take more than 22 minutes to commute one-way. If the standard deviation of such commutes is 6.5 minutes, what is the mean commute?
There is a normal distribution with mean 10 and standard deviation of 8. What is the z-score of an observation equaling 15?
The diameters of ball bearings are distributed normally. The mean diameter is 99 millimeters and the standard deviation is 5 millimeters. Find the probability that the diameter of a selected bearing is greater than 109 millimeters. Round your answer to four decimal places.
A small retail store has customers whose ages are normally distributed, with a mean of 37.5 and a standard deviation of 7.6. What is the probability that a randomly selected customer is younger than 25 years old? Round your answer to three decimal places, e.g. 0.685.
Suppose x~n(8,9). What value of x is 0.67 standard deviations to the left of the mean?
Suppose that SAT scores among U.S. college students are normally distributed with a mean of 500 and a standard deviation of 100. What is the probability that a randomly selected individual from this population has an SAT score between 500 and 600? 0.1587 0.3173 0.4207 0.3413
GIL internet services record customer usage patterns. Historically they have found the duration of an internet session is normally distributed with an average duration of 77.5 minutes and a standard deviation of 20.6 minutes. What is the probability a randomly selected session would last longer than two hours or less than thirty-five minutes? (4 decimal places)
A soft drink machine outputs a mean of 27 ounces per cup. The machine's output is normally distributed with a standard deviation of 44 ounces. What is the probability of filling a cup between 21 and 31 ounces? Round your answer to four decimal places.
The life of button batteries is normally distributed with a mean of 68.1 hours and a standard deviation of 18 hours 936 of the button batteries will last more than how many hours? (2 decimal places)
Which of the following is not a characteristic of the normal probability distribution? The mean, median, and the mode are equal The mean of the distribution can be negative, zero, or positive The distribution is symmetrical The standard deviation must be 1
Find mean if n is 2 and p is 0.7
According to AAA, the price of a gallon of regular, unleaded gas across gas stations in North Carolina is normally distributed with a mean of $2.39 and a standard deviation of $0.15. Find the price such that the probability that a randomly chosen gas station charges more than that price is 5%. Group of answer choices $2.14 $2.39 $2.52 $2.64 thanks