In an art school, the time it takes for students to paint a dessin painting isnormally distributed with an AVERAGE of 3.2 hours and a VARIANCE of 3.24.What is the probability that the average time it will take a class of 25students to paint a painting is AT LEAST 3.5 hours? *

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Answered: In an art school, the time it takes for…

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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* Your answer is incorrect. Service time for a customer coming through a checkout counter in a retail store is a random variable with the mean of 3.5 minutes and standard deviation of 3.5 minutes. Suppose that the distribution of service time is fairly close to a normal distribution. Suppose there are two counters in a store, n₁ = 2 customers in the first line and n₂ = 13 customers in the second line. Find the probability that the difference between the mean service time for the shorter line X₁ and the mean service time for the longer one X₂ is more than 0.1 minutes. Assume that the service times for each customer can be regarded as independent random variables. Round your answer to two decimal places (e.g. 98.76). P = i 98.80

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In an art school, the time it takes for students to paint a dessin painting is normally distributed with an AVERAGE of 3.2 hours and a VARIANCE of 3.24. What is the probability that the average time it will take a class of 25 students to paint a painting is AT LEAST 3.5 hours? *