.The duration of a certain cancer from the onset of symptoms until death ranges from 5 to 15years; their average is 7 years with a standard deviation of 3 years. A sample record of 20 patientswere taken at random. What is the approximate probability that the average duration is less than6 years?0.08810.07810.09810.0681

The mean is 7 years and the standard deviation is 3 years.

Answered: . The duration of a certain cancer from…

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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a sample size of 49 drawn from a population with a mean of 36 and a standard deviation of 15 for the size of the English class. What is the probability the class will have greater than 40?
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Suppose samples of size 100 are drawn randomly from a population that has a mean of 20 and a standard deviation of 5. What is the probability of observing a sample mean equal to or greater than 20.5? 0.8384 0.4192 0.1634 0.9192 0.1587
A population has a mean of 50 and a standard deviation of 19 If a random sample of 36 is taken, what is the probability that the sample mean is each of the following? a . Greater than 50. b. less than 52. C. less than 49. d.between 45.5 and 54.5 e and Between 50.5 and 51.1
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According to a study done by UCB students, the height for Martian adult males is normally distributed with an average of 65 inches and a standard deviation of 2.4 inches. Suppose one Martian adult male is randomly chosen. Let X = height of the individual. Round all answers to 4 decimal places where possible. %3D b. Find the probability that the person is between 62.4 and 65.3 inches. c. The middle 30% of Martian heights lie between what two numbers? Low: inches High: inches
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