8.) In the recent year, the average movie ticket cost is $10. In a random sample of 50 movie tickets from various areas, what is the probability that the mean ticket cost exceeds $8.75, given that the standard deviation is $1.39?

8.) In the recent year, the average movie ticket cost is $10. In a random sample of 50 movie tickets from various areas, what is the probability that the mean ticket cost exceeds $8.75, given that the standard deviation is $1.39?

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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Question

28.) In the recent year, the average movie ticket cost is $10. In a random sample of 50 movie tickets from various areas, what is the probability that the mean ticket cost exceeds $8.75, given that the standard deviation is $1.39?

Expert Solution

Step 1: Given information

$P o p u l a t i o n space m e a n space colon space mu space equals space $ 10 P o p u l a t i o n space s tan d a r d space d e v i a t i o n thin space colon thin space sigma space equals space $ 1.39 S a m p l e space s i z e thin space colon space n space equals space 50 T h e space p r o b a b i l i t y space t h a t space t h e space m e a n space t i c k e t space cos t space e x c e e d s space $ 8.75 space equals space ? space$

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