Download 2008 AEA 267 6th Grade Math Bee Statistics and Probability I-4

2008 AEA 267
6 Grade Math Bee
Statistics and Probability I-4
Name _______________________________
School ______________________________
Student Number________________________
th
1. The stem-and-leaf plot below displays the travel times to school for 26
different students. Determine how many students spend 15 minutes or
more traveling to school.
Score
1.
________________
students
2.
________________
3.
________________
Travel Times to School (minutes)
0
1
2
3
4
3
0
0
0
5
3 5 7 8 9
2 3 5 6 6 8 9
1 3 3 3 5 5 8 8
5
Hint:
2 5 means 25 minutes
2.
1
the total area of A, what is the
4
probability that a dart will land in a region marked A on the dart board?
Given that regions B and C are each
A
B
C
A
(Write your answer as a fraction in simplest form)
3. Which boy has the best chance of making his next free throw?
Name
Garrett
David
Ken
Alex
Free throw
attempts
54
49
73
60
Free throws
made
29
39
45
42
4. Lunch at Northside consists of one sandwich, one vegetable, and one
cookie. Using the menu below, how many lunches are possible at
Northside Middle School?
Northside Middle School Lunch Menu
Friday, May 7
Sandwiches
Vegetables
Cookies
Grilled Cheese
Carrots
Chocolate Chip
Hamburger
Spinach
Oatmeal
Turkey
4. ________________
lunches
5. When two six-sided number cubes are rolled, what is the probability
that their sum will be 3?
(Write your answer as a fraction in simplest form)
5.
________________
(OVER)
(Statistics and Probability,I-4, page 2)
6. Use the line plot below to determine the mean number of people in a
household.
6. ________________
people
People in the Household
1
X
2
X
X
3
X
4
5
X
X
6
7. In a crash test, 10 cars were tested to determine what impact speed was
required to obtain minimal bumper damage. The results for crash tests
for each of the 10 cars are listed below in miles per hour. Find the mode
speed that resulted in minimal bumper damage.
7.
miles per hour
24, 15, 18, 20, 18, 22, 24, 26, 18, 26
8. The booster club is planning to buy peanuts to serve at its meetings.
The cost of the peanuts depends on the amount purchased, as shown in
the table below. How much will 18 pounds of peanuts cost?
Total Number of
Pounds Purchased
0-5
6-10
11-20
Over 20
Cost of Peanuts per
Pound
$2.50
$2.25
$2.00
$1.75
8. $ ______________
9. The prices of gasoline in a certain region are $2.91, $2.86, $3.07, and
$2.95 per gallon. What is the median price per gallon for gasoline in
this region?
10. There are two jars of gumballs. Jar A contains 6 pink gumballs and 8
purple gumballs. Jar B contains 9 pink gumballs and 12 purple
gumballs. Drawing a single gumball at random, which statement below
best describes the probability of obtaining a purple gumball?
A. There is a better chance of getting a purple gumball from Jar A.
B. There is a better chance of getting a purple gumball from Jar B.
C. The chance of getting a purple gumball is the same for both Jar
A and Jar B.
D. You cannot tell from the information given.
(Write the letter of the correct choice on the answer blank.)
9. $ ______________
10. _______________