7th Math GMAS Prep 3

A gym teacher at Jackson High School wants the school to have a new team sport: soccer, lacrosse, or rugby. She will take a survey to determine which of those sports most students prefer. Which population would provide a random sampling for the gym teacher to use?

• all students at the school who are sixteen years old

• all students who buy lunch at the school on Friday

• half of the students who play on team sports at the school

• every third student arriving at school

Tags

CCSS.HSS.IC.B.3

The mean of Data Set A is ​ (a)   the mean of Data Set B.

The median of Data Set A is ​ (b)   the median of Data Set B.

• 3 less than
• 1 more than
• 1 lessthan
• 2 more than
• 2 less than
• 3 more than
• 4 more than
• 4 less than
• equal to

Consider the two box plots.

Which statement is TRUE?

• Plot F has a greater range than Plot H.

• Each plot has more than 25% of the data greater than 50.

• The median of Plot F is greater than the median of Plot H.

• The spread between the upper and lower quartiles on both graphs is 10

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

A data set contains 15 data points and has a mean of 6.2 and a median of 6. Thirteen of the data points are plotted on the line plot.

Complete the line plot by adding Xs for the two missing data points.

Tags

CCSS.6.SP.B.4

CCSS.HSS.ID.A.1

The heights, in feet, of random samples of trees from three forests are shown.

Move each measure into the table to identify which forest is expected to have the greatest measure of center and which forest is expected to have the greatest measure of variability based on the samples.

a

b

c

-

greatest measure of center

greatest variability

Tags

CCSS.6.SP.A.2

A bag contains 14 blue marbles and 14 purple marbles.

What is the likelihood of randomly drawing a purple marble?

• certain

• likely

• neither unlikely nor likely

• not likely

Tags

CCSS.7.SP.C.5

A number cube with faces numbered 1 to 6 is rolled 15 times.

In theory, how many times would you expect to roll a number less than 5?

• 2.5

• 5

• 10

• 12.5

Tags

CCSS.7.SP.C.6

The table shows the results of randomly selecting colored marbles from a bag 40 times. The marble was returned to the bag after each selection.

Based on these results, what is the expected probability of randomly selecting a green marble from the bag in one attempt?

• 0.125

• 020

• 0.80

• 1.0

Tags

CCSS.7.SP.C.6

The six sides of a number cube are labeled 1, 2, 3, 4, 5, and 6. You flip a coin and roll the number cube. In theory, what is the probability that the coin lands on heads and you roll a number greater than 4?

Tags

CCSS.HSS.CP.B.7

A cube numbered from 1 through 6 is rolled 300 times. The number 6 lands face-up on the cube 32 times.

What is the closest estimate for the experimental probability of 6 landing face-up on the cube?

• 0.087

• 0.107

• 0.127

• 0.188

Tags

CCSS.7.SP.C.6