Review for Chapter 4 Quiz

A company is testing their batteries in digital cameras to see if they last long enough to take 500 pictures. Each day they test 20 batteries and graph the overall percentage of the batteries that have failed the test so far.

Estimate the probability(as a %) that one of the company’s batteries will fail before taking 500 pictures with a digital camera.

Ignore the letter 'A' on the graph.

A company is testing a newly developed coin to be used in the Super Bowl to determine which team gets to choose how they will start the game.

Estimate the probability (as a %) that a flip of the coin will give heads. __________

What Statistical law is being illustrated in the previous 2 questions?

At a high school, some students take Spanish, and some do not. Also, some students take an arts subject, and some do not. Let S be the set of students who take Spanish and A be the set of students who take an arts subject. On the Venn diagrams given, shade the region representing the following instances:

A gym runs 2 fitness classes: spin and circuits.

On Saturday, 100 people visited the gym.

18 people total attended spin class.

10 people attended both classes.

58 people did not attend either class.

Use the textbox tool in the 'show your work' area to create a representation of this information in a Venn Diagram and fill in the two way table:

Fill in what you know first, then figure out the missing numbers.

Use #5:

What is the probability, as a fraction, that a randomly selected person attended only circuit class?

What is the probability that a randomly selected person attended exactly 1 class?

Which sport is enjoyed by the most number of people?

Enter all answers for #17 - 24 as a fraction that is not simplified.

P(boy) =

P(boy and does not play football) =

P(plays football) =

P(boy | play football) =

P(girl | play football) =

P(girl) =

P(girl or does not play football) =

P(girl | does not play football) =