PLEASE READ BEFORE ANSWERING!!! I only need instructions to solve this using TI-

Question

PLEASE READ BEFORE ANSWERING!!!
I only need instructions to solve this using TI-84 Plus calculator. I already know how to solve manually. PLEASE READ BEFORE ANSWERING!!!
I only need instructions to solve this using TI-84 Plus calculator. I already know how to solve manually. Solve the problem. 7) The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 85 inches, and a standard deviation of 14 inches. What is the probability that the mean annual precipitation during 49 randomly picked years will be less than 87.8 inches? C) 0.5808 A) 0.4192 B) 0.0808 D) 0.9192

Explanation / Answer

Mean ( u ) =85
Standard Deviation ( sd )= 14/ Sqrt(n) = 2
Number ( n ) = 49
Normal Distribution = Z= X- u / (sd/Sqrt(n) ~ N(0,1)                  
P(X < 87.8) = (87.8-85)/14/ Sqrt ( 49 )
= 2.8/2= 1.4
= P ( Z <1.4) From Standard NOrmal Table
= 0.9192                  

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