Answer:
Probability that average height would be shorter than 63 inches = 0.30854 .
Step-by-step explanation:
We are given that the average height of 20-year-old American women is normally distributed with a mean of 64 inches and standard deviation of 4 inches.
Also, a random sample of 4 women from this population is taken and their average height is computed.
Let X bar = Average height
The z score probability distribution for average height is given by;
Z =
~ N(0,1)
where,
= population mean = 64 inches
= standard deviation = 4 inches
n = sample of women = 4
So, Probability that average height would be shorter than 63 inches is given by = P(X bar < 63 inches)
P(X bar < 63) = P(
<
) = P(Z < -0.5) = 1 - P(Z <= 0.5)
= 1 - 0.69146 = 0.30854
Hence, it is 30.85% likely that average height would be shorter than 63 inches.
Answer:
S = 3.500t
11 weeks, because in 11 weeks he will have saved up 38.500, + the 5 he has saved equals 43.500.
Step-by-step explanation:
Answer:
D. 3,750
Step-by-step explanation:
Use proportions to solve:
125/500 = x/15000
Cross multiply:
125*15000 = 1,875,000
1,875,000/500 = 3,750
x = 3,750
Answer:
5 x + 3 = 23
Step-by-step explanation:
Answer:
<h2>384 yd²</h2>
Step-by-step explanation:
The formula of a surface area of a cube:

We have <em>a = 8 yd</em>.
Substitute:
