Answer:
Therefore, the average amount of rainfall per day for the 8-day period is 0.2375in.
Step-by-step explanation:
We know that Annabelle measured and recorded the amount of rainfall for 9 days in a row. Her results are shown below. 3/10in., 1/5in.,1/10in., 3/10in., 2/5in., 1/5in., 1/5in., 1:5in.
We have 8 values given. So we will calculate the average value in 8 days.
We have
3/10+1/5+1/10+3/10+2/5+1/5+1/5+1/5=19/10
we get
Therefore, the average amount of rainfall per day for the 8-day period is 0.2375in.
Step-by-step explanation:
a. First, find the z-score.
z = (x − μ) / σ
z = (80 − 74.0) / 12.5
z = 0.48
Use a calculator or table to find the probability.
P(z < 0.48) = 0.6844
b. Find the standard deviation of the sample.
σₓ = σ / √n
σₓ = 12.5 / √4
σₓ = 6.25
Find the z-score.
z = (x − μ) / σ
z = (80 − 74.0) / 6.25
z = 0.96
Use a calculator or table to find the probability.
P(z < 0.96) = 0.8315
c. When the distribution of the population is normal, then the distribution of the sample mean is also normal.
Answer:
Assuming this is a rectangular prism the surface area would be 324ft^2.
Step-by-step explanation:
Surface Area = 2(lw + lh + wh).
Answer:
175
Step-by-step explanation:
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