Probability & Statistics Quiz

Is the following statement biased or fair: “Would you prefer a vacation in pleasant, sunny Florida, or in the barren wasteland of the Arctic?

• Biased

• Fair

• Neither

Tags

CCSS.RL.11-12.6

Is the following statement biased or fair: “Would you prefer going to the beach or going to the mountains?

• Biased

• Fair

• Neither

Tags

CCSS.RL.11-12.6

If the probability of an event is 1, then it is _________.

• likely

• unlikely

• certain

• impossible

Which of the following describes two dependent events?

• A fair die is rolled and a coin is tossed.

• A card is chosen from a deck, replaced, and another card is chosen.

• A marble is picked from a bag, not replaced, and then another marble is chosen.

• Two fair dice are rolled.

You roll a fair number cube. Classify the event as either unlikely, likely, or neither unlikely nor likely: "Rolling a 3"

• unlikely

• likely

• neither unlikely nor likely

You roll a fair number cube. Classify the event as either unlikely, likely, or neither unlikely nor likely: "Rolling a number less than 4"

• unlikely

• likely

• neither unlikely nor likely

Suppose you toss a coin several times and record the results. Out of 20 trials, you got tails 11 times. What is the experimental probability of getting tails?

Suppose you toss a coin several times and record the results. Out of 20 trials, you got tails 11 times. How does this compare to the theoretical probability?

• more often

• less often

• exactly the same

A seventh grade ELA teacher wants to order books for all the seventh grade classes. He wants to determine the favorite type of book among the 7th grade students. Which sample would be the most appropriate for this survey?

• 7 girls in each of his classes

• every fifth student in the 7th grade

• 1 out of every 7 students in his middle school

• all of the boys in one of his seventh grade class

The results for a survey of 120 students who were selected randomly are listed below: 60 students have a cell phone plan with company X, 36 students have a plan with company Y, 24 students do not have a cell phone. The total population of students was 380. Based on the data, what is the best approximation for the total number of students who have a cell phone plan with company Y?

• 114

• 127

• 143

• 163