Find X if
X' * X =
(50, 300)
(300, 1000)
Then find Y if
Y * X =
(300, 2000)
Problem is that when I try to solve for X (or X') first, I get three equations with four unknowns (a11, a12, a21, a22). Any help?
I a survey, out of 530 women and 509 men, 10.4% of the women and 21.6% of the men answered yes to a question.
Calculate a 99% CI for the difference between two times the population proportion women and the population proportion men who answered "yes".
Answer from book: (-0.091;0.075)...
Nr of customers arriving at a shop follow Poisson.
In 15, an average of 4 customers arrive.
a)
A customer has just arrived. Then a minute passed and no one arrived. What is the probability of it takoing at least 5 more min. until another customer arrives?
b)
Consider 40 non-overlapping...