Data Analysis and Probability

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MULTIPLE CHOICE

The probability that a battery is defective is

. In a shipment of

batteries, how many batteries can be expected to be defective?

a.
b.
c.
d.
e.	None of the above

There are

dancers standing in a horizontal line on a stage. In how many differernt ways could the director place the dancers in a line?

a.
b.
c.
d.
e.	None of the above

A jar contains four blue marbles, three red marbles, and two white marbles. What is the probability that a marble randomly selected from the jar will be a white marble?

a.
b.
c.
d.
e.	None of the above

Jim plays on a softball team. The ages of the players on the team are:

What is the mean age of the players on the team?

a.
b.
c.
d.
e.	None of the above

A band director surveyed students about their favorite musical instrument. The results of the survey are:

It is estimated that about

students chose the piano as their favorite musical instrument. Based on this data, about how many students did the director survey?

a.
b.
c.
d.
e.	None of the above

Given:

with key

What is the Median of the data set in the stem and leaf plot above?

a.
b.
c.
d.
e.	None of the above

How many different four digit numbers can be made from the digits

, and

if the digits cannot be repeated?

a.
b.
c.
d.
e.	None of the above

Given:

with key

The number of students buying lunch in the cafeteria during the last two weeks is shown in the above stem and leaf plot. What is the median number of students buying lunch?

a.
b.
c.
d.
e.	None of the above

A set of

cards is randomly placed face down on a table. Eight cards have only the letter A written on the card’s face. Ten cards have only the letter B written on the card’s face. Oscar turned over one card. What are the odds of this card having the letter A written on the face of the card?

a.
b.
c.
d.
e.	None of the above

10.

There are five blue, three green, and seven red plastic chips in a box. What is the probability of randomly drawing, without replacement, a green chip and then a red chip from the box?

a.
b.
c.
d.
e.	None of the above

11.

Using a cellular phone: The horizontal scale represents hours used and the vertical scale represents total cost.

Based on the graph, what would be the cost of using a cellular phone for ten hours?

a.
b.
c.
d.
e.	None of the above

12.

Which scatter plot best supports the conclusion that as the number of years of education (horizontal scale) increases, then the yearly earnings (vertical scale) increases?

a.
b.
c.
d.
e.	None of the above

13.

Which scatter plot would best represent the line of best fit for the equation

a.
b.
c.
d.
e.	None of the above