Unit 6 Quiz 1 - Binomial & Geometric Distributions

Find the mean of a binomial distribution with n=50 and p=0.4

• 50

• 20

• 12

• 0.6

Tags

CCSS.HSS.ID.A.4

Find the Variance of a binomial distribution with n=50 and p=0.4

• 50

• 20

• 12

• 0.6

An accountancy test has 5 multiple choice questions with four choices with one correct answer each. If we just randomly guess on each of the 5 questions, what is the probability that you get at least 1 question correct? [Binomial Distribution]

• 0.2373

• 0.3955

• 0.7627

• 0.6045

Which of the following is false about binomial probabilities?

• Their distributions are approximately symmetric.
• Trials must be fixed.
• Events musts be independent.
• The probability of success must be 0.50

The American Red Cross says that about 11% of the U.S. population has Type B blood. A blood drive is being held at your school.What is the probability that exactly 2 of the first 20 blood donors have Type B blood? [Binomial Distribution]

• 0.316

• 0.282

• 0.001

• Not here

Tags

CCSS.HSS.CP.B.9

The owner of a pet store is trying to decide whether to discontinue selling specialty clothes for pets. She suspects that only 4% of the customers buy specialty clothes for their pets. What is the probability that she does NOT sell a garment until the 7th customer? Assume each customer is independent. [Geometric]

• 0.033

• 0.027

• 0.0313

• Not here

Tags

CCSS.HSS.MD.B.6

CCSS.HSS.MD.B.7

In a survey, it is found that 75% of the bulbs in a particular shop are in good condition. Find the probability that out of 10 bulbs, more than 8 bulbs are in good condition. [Binomial]

• 0.2540

• 0.2440

• 0.4440

• 0.2540

There are 5 000 people in a village. It is found that 8 out of 10 of the villagers installed broadband at home. Find the mean, variance and standard deviation for the number of people who have broadband at home.

• 1 000; 800; 28.28

• 1000; 800; 26.26

• 4 000; 800; 28.28

• 4 000; 800; 26.26

If the probability that a house in your neighborhood has a dog is 60%, what is the chance that you find a house with a dog before the fifth house? [Geometric]

• 0.97

• 0.99

• 0.02

• 0.04

Tags

CCSS.HSS.MD.B.6

CCSS.HSS.MD.B.7

Peyton Manning completes 67% of his passes. What is the probability that it takes more than four throws to complete his first pass in a game? [Geometric]

• 0.99

• 0.01

• 0.04

• 0.96