Probability Distributions Slides

The number of runs scored by the Kansas City Royals in the last game of the World Series.

• Discrete
• Continuous

The amount of snow that falls in Glens Falls each November.

• Discrete
• Continuous

Is this a probability distribution?

• No
• Yes

Is this a probability distribution?

• No
• Yes

Find the mean of the probability distribution.

• 85
• 83.2
• 87.1
• 84.4

Is the probability of getting a 95 unusual?

• No
• Yes

A company states that 2% of its computers are returned for defects.  We take a sample of 100 computers to find the probability of 10 being defective.  Is this a binomial distribution?

• No because there is not a fixed number of trials.
• No because their are more than 2 outcomes.
• Yes since there are a fixed number of independent trials, outcomes in 2 categories, and the probability of defect is constant.
• No since computers would not be independent.

On an eight question multiple choice quiz with 4 answers for each question, what is the probability of guessing and getting 6 correct answers?

• .004
• .109
• .003
• .9996

On an eight question multiple choice quiz with 4 answers for each question, what is the probability of guessing and getting at least 7 correct answers?

• .00002
• .99998
• .0004
• .9996

The table represents the probability of guessing correct on a 5 question true-false quiz.  Find the probability for at least 4 questions correct.

• .03125
• .15625
• .3125
• .1875