The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 78 inches, and a standard deviation of 16 inches. what is the probability that the mean annual precipitation during 64 randomly picked years will be less than 80.8 inches?

The sample mean is μ=78, and sample standard deviation is σₓ=σ/=16/=2.

The Z-score is .

The required probability

Refer to standard normal distribution table.

i use my brain for prombles like this maybe you could try it

step-by-step explanation:

x=-7

step-by-step explanation:

x+3=-10

-10+3=-7

x=-7