Answer:
Step-by-step explanation:
The image contains the work.
Answer:
12.73
Step-by-step explanation:
$63.64 * .20 = 12.73
Answer:
is it 20% I'm not really sure
também n sei. Se alguém souber por favor ajuda aí plissss
The sample std. dev. will be (14 inches) / sqrt(49), or (14 inches) / 7, or 2 inches.
Find the z score for 93.8 inches:
93.8 inches - 91.0 inches 2.8 inches
z = ------------------------------------- = ----------------- = 1.4
2 inches 2 inches
Now find the area under the standard normal curve to the left of z = +1.4.
My calculator returns the following:
normalcdf(-100,1.4) = 0.919. This is the probability that the mean annual precipitation during those 49 years will be less than 93.8 inches.
