56/225=0.2489?
(A) To make sure that you get two heads you need to only flip four coins.
(B) In the next two flips of a coin, there will be exactly one head and one tail.
(C) A computer simulation of 100 coin flips would produce exactly 50 heads and 50 tails.
(D) Over a long period of time, there will be equal proportions of heads and tails.
This law explains:
*that as the sample size increases, the sample mean is more likely to be close to the population mean
*larger sample size will result in less sampling error.
What is the law of large numbers?
Find the probability of selecting 2 blue marbles if the first selection is replaced before the next selection is made.
9/100=0.09?
Find the probability of a person drawing another spade given that the first card was not put back into the deck.
12/51=0.2353?
Find the probability of selecting a green marble followed by a yellow marble if each selection is not replaced.
10/90=0.1111?
Find the probability of drawing a diamond card given that the card drawn was a queen.
1/4=0.25?
Which is more variable?
(A) the distribution of the sample means with this larger sample size (N=25)
(B) the distribution of sample means when the sample size was smaller (N=5)?
Find the probability of choosing a purple and then a yellow marble (with replacement).
595/2704=0.2200?
Find the probability of a person drawing a king given that it is a club.
1/13=0.0769?
As the variability in the distribution of sample means decreases, the amount of sampling error:
(A) stays the same
(B) increases
(C) decreases
What is C?
A bag of 10 marbles has 5 green marbles, 3 blue marbles, and 2 yellow marbles.
Find the probability of selecting all blue marbles if each selection is not replaced.
What is
6/720=0.0083?
P(A)=0.4 and P(A or B)=0.6. Find P(B).
What is the expected amount of sampling error between the sample mean of a given size and the population mean?
What is
sigma/sqrt(n)?