CRM 3.4 review

Write the fraction that shows the probability of drawing a blue card.

Mathematical Equivalence

ON

Using the simulation results, how many times could you predict to draw a blue card when the total number of cards drawn is 630?

Mathematical Equivalence

ON

O’Neill’s Pillow Store made 600 pillows yesterday and found that 6 were defective. If they plan to make 4,300 pillows this week, predict approximately how many pillows will be defective.

• 100

• 12

• 43

• 8,523

Nadia is conducting an experiment where she repeatedly draws a marble from a bag without looking, records its color, and replaces it. She conducted 40 trials in the experiment, with the results shown below. If Nadia were to conduct the same experiment with 2,000 draws, approximately how many times could she expect to draw a yellow marble?

• 400

• 125

• 250

• 500

Yesterday, O’Neill’s Pillow Store manufactured 1,200 pillows and found 18 to be defective. If they plan to manufacture 7,200 pillows next month, predict the number of defective pillows.

• 144

• 72

• 216

• 108

A school district polled 400 people to determine if it was a good idea to not have school on Friday. 120 of those people responded that it was not a good idea to have school on Friday. Predict the approximate number of people who think it would be a good idea to not have school on Friday from a population of 6,228 people.

• 30

• 1,868

• 52

• 1,985

The population of Christmas, FL in 2012 was 12,762. Based on the results of the survey shown in the circle graph, how many people do you predict will buy vegetable seeds in 2012?

• 7,912

• 1,659

• 3,191

• 4,850

Identify the sampling method that would most accurately reflect the entire student body's opinion in this context.

Interest in extracurricular activities among high school students.

Method A: Survey 50 students in three tenth-grade science classes. 68 percent are interested in extracurricular activities.

Method B: Survey 80 students selected randomly from the entire school. 78 percent are interested in extracurricular activities.

• Method A

• Method B

Matthew has every third student in his grade fill out a survey about their favorite color. 52 out of the 80 students he surveyed chose pink. How could he make it more representative of the whole school? He could​ ​ (a)   ​

• survey everyone in the school
• survey the teachers
• survey 80 more people
• survey the entire 7th grade.

Jameson has images of both a scaled drawing and an actual game board with some measurements shown. What is the scale factor?