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.
Answer:
true
Step-by-step explanation:
i think
Answer:
Step-by-step explanation:
EF = CD
FC = DE These equal lines are properties of a parallelogram.
2y = 3y - 17 Add 17 to both sides
2y + 17 = 3y Subtract 2y from both sides.
2y-2y+17 =3y-2y
y = 17
CD = y + 43
CD = 17+43
CD = 60
Since CD = 60 then FE = 60