I think is range because the numbers are underline
$10 can buy = 3 cans
$1 can buy=3/10 cans
$40 can buy =(3/10)*40=12 cans
7.43: Let denote the random variable for height and for the sample mean. Then if is the mean of
So the probability that the difference between the sample and population means does not exceed 0.5 inch is
per the empirical or 68/95/99.7 rule.
7.44: For a sample of size <em>n</em>, the sample standard deviation would be . We want to find <em>n</em> such that
Comparing to the equation from the previous part, this means we would need
so a sample of at least 157 men would be sufficient.
C I guess I was learning this in class but I'm not sure.
Answer: 11.5 ft
Step-by-step explanation:
The length of the shadow of the building = length of the shadow - distance of the building
= 52 - 32
= 20
Let the height the shadow strike the side of the building be h
then by similar shape rule
h / 20 = 30 / 52
52h = 30 x 20
52h = 600
h = 600/52
h = 11.53846154
h ≈ 11.5