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.HELLO, HOW DO I ANSWER IS QUESTION BY CALCULATOR. I WAS TOLD I CAN USE 2ND...

.HELLO, HOW DO I ANSWER IS QUESTION BY CALCULATOR. I WAS TOLD I CAN USE 2ND VARS (2) NORMAL CDF. THE ANSWERS IS 0.9940. PLEASE WRITE THE STEPS FOR ME TO GET THE ANSWER BY CALCULATOR. THANK YOU.

In the past, all patrons of a cinema complex have spent an average of $5.00 for popcorn and other snacks, with a standard deviation of $1.80. If a random sample of 32 patrons is taken, what is the probability that the mean expenditure of this sample is greater than $4.20?

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I am calculating the probability using R software. The code and output is given.

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