6th Grade CST Questions (Probability, Central Tendency)
Jeremiah is on the Eagles bowling team. His scores
for the past 12 games are shown below.
90
What is the mode of the scores?
102
104
110
Abe found the mean and median of this list of
numbers.
If the number 6 were added to the list then
the mean would increase
the mean would decrease
the median would increase
the median would decrease
1,3,3
A snack bar sells 5 items with a mean (average) price
of $0.60 as shown below.
Energy Bar (.45) and Cookie (.50)
Which pair of items could be added to the menu
without changing the average price?
Energy Bar (.45) and Soda (.75)
Mary earned a score between 75 and 89 on all of her
previous spelling tests. She earned a score of 100 on
her next test. Which of the following statements is
true?
The mode will increase
The mean will increase
The mean will decrease
The median will decrease
selecting ten students from each homeroom
selecting members of the girl's softball team
selecting members of the boy's football team
Wendy wants to take a survey to determine which
flavor of ice cream is the most popular at her school.
Which of the following methods is the best way for her
to choose a random sample of the students at her
school?
selecting students who like Wendy's favorite flavor
taking coins until she has one of every kind
taking ten coins of each type from the container
taking thirty coins out of the container without
    looking
taking one coin from the container
Celia has a large container in which four different kinds
of coins are thoroughly mixed. She wants to take a
sample of her coins to estimate which kind of coin she
has the most. Which of the following methods is the
best way for her to select a sample?
surveying cheerleaders for the home team
surveying people wearing hats for the visiting team
surveying a group of people standing in line for
    tickets
surveying people who do not live in the home
    team's city
Jason wants to find out the most popular football team
at a game between the home team and the visiting
team. Which of the following methods will give him
the most accurate results?
A shopping mall wants to conduct a survey of the
people who shop at the mall. Which would give them
the most representative sample?
conducting the survey at the entrance to the mall
conducting the survey at one shoe store
conducting the survey at all the shoe stores
conducting the survey a mile away from the mall
Companies II and V made the same profit
No company made less than $275,000 profit
No company made more than $300,000 profit
Company IV made $75,000 more profit
     Company III
Which statement is valid
about the annual profits
of these five companies?
{(Ann,Carlos),(Ann,Lisa)}
{(Ann,Dave),(Ann,Mia),(Carlos,Dave),(Carlos,Mia),
      (Lisa,Dave),(Lisa,Mia)}
Which set shows all the possible choices of two people?
{(Ann,Dave),(Carlos,Mia),(Lisa,Dave),(Lisa,Mia)}
Ms. Gomez is going to choose one person from each
of the two lists below to represent the class in student
council.
{(Ann,Dave),(Ann,Mia)}
Norma has 10 black, 12 white, and 3 brown pairs of
socks in one drawer. What is the probability that,
without looking, Norma will pick a brown pair of
socks from the drawer?
4%
12%
14%
33⅓%
A drawer is filled with red and blue socks. If the
probability of selecting a red sock at random is
what is the probability that a blue sock will be
chosen at random?
2
5
3
5
2
3
3
2
2
5
In her pocket, Kira has 2 red marbles, 2 green marbles,
and 2 blue marbles that are all the same size. If Kira
picks one marble out of her pocket without looking,
what is the probability that it will be either red or
green?
½
What is the probability of picking a large shirt?
¼
½
4%
If Paul chooses a T-shirt without looking, what is the
probability that it will be blue?
8%
40%
60%
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