Probability Distributions

Front

Which one of the following is a discrete random variable?

• Sam's height
• Sam's weight
• Time Sam runs the 110 m hurdles
• Amount of Sam's brothers and sisters

Back

Amount of Sam's brothers and sisters

Front

Classify: How many miles it takes to use up a tank of gas.

Back

Continuous

Front

Is this a probability distribution?

Back

No, the sum of p(x) does not equal 1.

Front

The table above shows a television station's advertisement sales. The distribution of sales for one 24-hour day is given. Solve for the mean. Round to the nearest hundredth.

Back

31.8

Front

Television station's advertisement sales distribution for one 24-hour day. Solve for the standard deviation.

Back

16.3

Front

Probability of getting exactly 3 questions correct out of 6 by random guessing (4 choices each).

Back

13.2%

Front

Probability that at least 2 of the first 10 blood donors have Type B blood (11% of U.S. population has Type B).

Back

0.303

Front

Mean of a binomial distribution with n=50 and p=0.4

Back

20

Front

Find the standard deviation of a binomial distribution with n=50 and p=0.4 (Round to the nearest tenth)

Back

3.5

Front

Probability of rolling doubles less than three times in 5 attempts when rolling two dice.

Back

0.965