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In The Second Quarter Of 2015, The Average Movie Ticket Cost $8.61. In A Random Sample Of 50 Movie Tickets From Various Areas, What Is The Probability That The Mean Cost Exceeds $8.00, Given That The Population Standard Deviation Is $1.39 - Math Discussion

In the second quarter of 2015, the average movie ticket cost $8.61. in a random sample of 50 movie tickets from various areas, what is the probability that the mean cost exceeds $8.00, given that the population standard deviation is $1.39