5. A fair coin is flipped 9 times. What is the probability of getting exactly 6 heads?
7.You flip a coin three times.
(a) What is the probability of getting heads on only one of your flips?
(b) What is the probability of getting heads on at least one flip
9. A jar contains 10 blue
marbles, 5 red marbles,
4 green marbles, and 1
Twomarbles are chosen
(a) What is the
probability that one will
be green and the other
red?Total number of
marbles = 10 blue + 5
red + 4 green +
Importance of Statistics
Like most people, you probably feel that it is important to "take
control of your life." But what does this mean? Partly, it means being
able to properly evaluate the data and claims that bombard you
every day. If you cannot disti
What are Statistics?
Statistics include numerical facts and figures. For instance:
The largest earthquake measured 9.2 on the Richter scale.
Men are at least 10 times more likely than women to commit
One in every 8 South Africans is HIV positiv
Descriptive statistics are numbers that are used to summarize and
describe data. The word "data" refers to the information that has
been collected from an experiment, a survey, a historical record,
etc. (By the way, "data" is plural