Probability and Statistical Inferences Review

What is the probability of an event that is certain to happen?

• 0.1

• 1

• 10

Tags

CCSS.7.SP.C.5

• Raymond is incorrect. He wants to draw a marble 100 times, which is not divisible by all of the probability model fractions. It does not matter if he draws a marble 10 times or 100 times.

• Raymond is incorrect. The actual outcome of selecting each color after 100 draws will be 10 times the outcomes of drawing a marble 10 times.

• Raymond is correct. The more times he draws a marble, the closer the probability model will match the actual outcomes of selecting each color from the jar.

• Raymond is correct. Every event should be tested 100 times to determine if the actual outcome is close to the expected outcome from the probability model.

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

In a survey of 75 students, 60 of them have a pet. Of those 60 students, 15 of them have a reptile. What is the probability that a randomly selected student has a pet other than a reptile?

• impossible

• equally likely

• likely

• unlikely

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

What is the likelihood that the spinner will land on 0?

• certain

• unlikely

• equally likely

• impossible

Tags

CCSS.7.SP.C.5

What is the probability of landing on an even number?

• certain

• unlikely

• equally likely

• impossible

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

The spinner is spun 100 times. Based on the theoretical probabilities of landing on each color, Eva predicted the following set of outcomes.

Side Color Eva's Prediction for the Number of times it is landed on

Red 20

Orange 20

Purple 20

Yellow 20

Green 20

Will Eva's predictions MOST LIKELY match the actual outcomes?

• Yes, experimental outcomes always equal theoretical outcomes.

• Yes, because she spun the spinner 20 times.

• No, because Eva's predicted outcomes should show the spinner landing on green the most and orange the least.

• No, because experimental outcomes rarely are the same as theoretical outcomes.

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

A gaming machine randomly dispenses a ball numbered 0-9. The machine dispensed a ball 750 times. How many of those numbers would be expected to be 3 or less?

• Around 333 times, but not exactly 333 times.

• Around 250 times, but not exactly 250 times.

• Around 300 times, but not exactly 300 times.

• Around 225 times, but not exactly 225 times.

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

Anna recorded the types of vehicles that drive by her house. The table shows the types of the last 150 vehicles that drove by her house. Using the data, what is the probability that the next vehicle to drive by her house will be a pickup truck?

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7

• The spinner contains 5 different colors, because the probability of landing on each color is given in fifths.

• The spinner is divided into sections, because the probability of landing on each color has the same denominator.

• The green section is the biggest because it contains the largest probability compared to the other colors.

• The yellow section of the spinner is twice as big as the blue section, because the probability of landing on yellow is twice that of blue.

Tags

CCSS.7.SP.C.5

The dice is rolled 40 times. The results are:

1 - 5 times

2 - 4 times

3 - 8 times

4 - 2 times

5 - 15 times

6 - 6 times

Which statement is TRUE about the results of landing on a 5?

• The theoretical probability is about twice the experimental probability.

• The experimental probability is about twice the theoretical probability.

• The theoretical probability is about four times the experimental probability.

• The experimental probability is about four times the theoretical probability.

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.6

CCSS.7.SP.C.7