Question 1.

The table shows the probability distribution for the number of heads when four coins are tossed.

What is the probability that no more than two heads show on a random toss?

X= number of heads Probability p(x) 0 0.0625 1 0.25 2 0.375 3 0.25 4 0.0625 a) 0.3125 b) 0.375 c) 0.6875 d) 0.875

Question 2.

On an algebra test, there are 7 students with As, 9 students with Bs, 11 students with Cs, 3 students with Ds, and 2 students with Fs.

Find the probability that a randomly chosen student has D. Round to the nearest tenth of a percent.

a) 3% b) 10.3% c) 9.4% d) 15.6%

Question 3.

Which of the following could not be a probability distribution?

A) Outcomes Probability 1 0.1 2 0.15 3 0.25 4 0.5 B) Outcomes Probability 1 0.97 2 0.01 3 0.01 4 0.01 C) Outcomes Probability 1 0.32 2 0.42 3 0.25 4 0.1 D) Outcomes Probability 1 0.43 2 0.21 3 0.2 4 0.16

Question 4.

Use the chart below.

What is the probability that a randomly selected person has earned at least a bachelor's degree? X = Level of Education Probability Some High School 0.154 High School Graduate 0.32 Some college 0.172 Associate's Degree 0.082 Bachelor's Degree 0.179 Advanced Degree 0.093

A) 0.179 B) 0.272 C) 0.728 D) 0.907

Question 5.

Use the chart below. In a given week, what is the probability that more than 300 CD's sell? Number of top 10 SDs Sold Each Week 0-100 101-200 201-300 301-400 401-500 Probability 0.1 0.15 0.4 0.25 0.1 a) 0.40 b) 0.25 c) 0.75 d) 0.35

Question 6.

Use the chart below. If a person is randomly selected, what is the probability that he or she has completed at most some college? X = Level of Education Probability Some High School 0.154 High School Graduate 0.32 Some college 0.172 Associate's Degree 0.082 Bachelor's Degree 0.179 Advanced Degree 0.093

a) 0.72 b) 0.474 c) 0.526 d) 0.646