Probability Quiz warm up

The probability that you will be ticketed for illegal parking on campus is about 1/3. During the last nine days, you have illegally parked every day and have NOT been ticketed. Today, on the 10th day, you again decide to park illegally. Assuming the outcomes are independent from day to day, the probability that you will be caught is

A friend has placed a large number of plastic disks in a hat and invited you to select one at random. He informs you that they have numbers on them, and that one of the following is the probability model for the number on the disk you have chosen. Which one is it?

• 
• 
• 
• 
• 

What is the probability associated with the number 2 in the table?

• 0.1

• 0.2

• 0.3

• 0.4

Which number has a probability of 0.4 in the table?

• 1

• 2

• 4

• 5

What is the probability of number 3 in the table?

• 0

• 0.1

• 0.2

• 0.3

Which number has the highest probability in the table?

• 1

• 2

• 4

• 5

What is the sum of all probabilities in the table?

• 1.0

• 0.9

• 1.1

• 1.2

Of people who died in the United States in a recent year, 86% were white, 12% were black, and 2% were Asian. Diabetes caused 2.8% of deaths among whites, 4.4% among blacks, and 3.5% among Asians. The probability that a randomly chosen death was due to diabetes is about

• 0.038

• 0.107

• 0.030

• 0.96

• 0.042

In your top dresser drawer are 6 blue socks and 10 grey socks, unpaired and mixed up. One dark morning you pull two socks from the drawer (without replacement, of course!). What is the probability that the two socks match?

• 0.450

• 0.375

• 0.075

• 0.550

• 0.500

Which of the following is a true statement?

• The binomial setting requires that there are only two possible outcomes for each trial, while the geometric setting permits more than two outcomes

• An important difference between binomial and geometric random variables is that there is a fixed number of trials in a binomial setting, and the number of trials varies in a geometric setting.

• A geometric random variable takes on integer values from 0 to n.

• If X is a geometric random variable and the probability of success is 0.85, then the probability distribution of X will be skewed left, since 0.85 is closer to 1 than to 0.

• The distribution of every binomial random variable is skewed right.