NAME:_____________________________
per :_____
Topic 3 Review 2013 2014
1.) Fifty teenagers were sampled at random about their
favorite movie genre. The results are listed in the table
below. Out of a population of four hundred teenagers, about
how many will prefer each of the following?
Type
3.) A farmer has two plots of land, which he calls North
Plot and South Plot. He plants corn in both plots at the
same time. After a few weeks, the farmer measures the
height of 10 randomly chosen corn stalks in both plots.
The data, in inches, are shown below.
Number
North Plot: 15, 15, 16, 16, 16, 17, 18, 18, 19, 20
Action
24
South Plot: 14, 14, 14, 15, 16, 16, 19, 19, 20, 21
Sci–Fi
13
Romance
7
Comedy
4
Drama
2
Action:
Sci-Fi
Romance:
Comedy:
Drama
2.)
a. Harry collected green balls in a bag. He drew
two balls of the five balls out
of the bag. Is this a random sample of the green balls in
the bag?
b. Kerry collected shells from a sea shore in a box. He
takes out a handful of shells from the box. Is this a
random sample of shells in a box?
Find the mean value of each data set. Use the values
that you determined above to make a comparative
inference about the corn stalks.
NAME:_____________________________
per :_____
Topic 3 Review 2013 2014
4.) The heights, in inches, of a group of seventh grade
students and a group of parents are shown below.
Students: 54, 57, 58, 58, 60, 67
6.) The California Biking Association wants to determine the
length of the longest bike ride that bike riders in the state of
California rode last week. To do this, they surveyed 15 people
that belong to the Dino Dash biking club in Tustin, California.
Their results (in miles) are shown in the list below:
Parents: 65, 65, 66, 67, 69, 69, 70, 70, 71, 72
53, 20, 61, 82, 94, 78, 30, 85, 78, 14, 76, 89, 100, 98, 72
Determine the difference in the means of the two data sets.
Part A:What is the range of miles that the 15 riders rode last
Determine the mean absolute deviation of one of the data
sets.
week?
Write a statement that approximates the difference in the
means as a multiple of the mean absolute deviation.
Part B:What is the mode of miles that the 15 riders rode last
week?
Part C:Is this survey representative of all the bike riders in the
state of California? Why?
5.) Define inference.
The data below shows the favorite cartoon of a random
sample of 80 students at a middle school. Make an inference
about the favorite cartoon of students at the middle school.
7.) Out of a jar filled with 200 jellybeans, Mona selected 32
of them and recorded their color. Out of the 32 jellybeans, 12
were red, 15 were green, and 5 were blue.
Determine the approximate amount of the 200 jellybeans
that are green.
Favorite
Sport
Number of Students
Family Guy
58
Scooby Doo
22
Looney Tunes
10
Determine the approximate amount of the 200 jelly beans
that are red.
Determine the approximate amount of the 200 jelly beans
that are blue
NAME:_____________________________
per :_____
Topic 3 Review 2013 2014