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Topic: Statistics and Probability

Quiz by PARCC

Grade 7

Math

Common Core

Feel free to use or edit the questions

includes Teacher and Student dashboards

Measures 5 skills from

Grade 7

Math

Common Core

7.SP.A.1

Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.

7.SP.C.7.A

Develop a uniform probability model by assigning equal probability to all outcomes, and use the model to determine probabilities of events.

7.SP.C.6

Approximate the probability of a chance event by collecting data on the chance process that produces it and observing its long-run relative frequency, and predict the approximate relative frequency given the probability.

7.SP.C.8.C

Design and use a simulation to generate frequencies for compound events.

7.SP.B.4

Use measures of center and measures of variability for numerical data from random samples to draw informal comparative inferences about two populations.

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Q 1/6

Score 0

Josephine owns a diner that is open every day for breakfast, lunch, and dinner. She offers a regular menu and a menu with daily specials. She wanted to estimate the percentage of her customers who order specials. She selected a random sample of

50

customers who had lunch at her diner during a three-month period. She determined that

28\%

of these customers ordered from the menu with specials. Which statement about Josephine's sample is true? (*NO CALCULATOR*)

The sample shows that exactly

28\%

of Josephine's customers ordered daily specials.

The sample is the percentage of customers who order daily specials.

No generalizations can be made from this sample, because the sample size of

50

is too small.

The sample might not be representative of the population because it only included lunch customers.

Q 3/6

Score 0

Reagan will use a random number generator $1,200$ times. Each result will be a digit from $1$ to $6.$ Which statement best predicts how many times the digit $5$ will appear among the $1,200$ results?

It will appear exactly $200$ times.

It will appear close to $240$ times but probably not exactly $240$ times.

It will appear close to $200$ times but probably not exactly $200$ times.

It will appear exactly $240$ times.

Q 4/6

Score 0

Lori wants to design a computer simulation to study how many spins it takes to land on each color once. Using the digits $0$ through $9,$ she will assign a digit to each section of the wheel. Which option describes how the digits can be assigned?

Assign the digit $0$ to blue, $1$ to yellow, $2$ to red, and $3$ to green.

Assign the digit $4$ to blue, $3$ to yellow, $2$ to red, and $1$ to green.

Assign the digits $0, 1$, and $2$ to blue; $3, 4,$ and $5$ to yellow; $6, 7,$ and $8$ to red; and $9$ to green.

Assign the digits $0, 1, 2,$ and $3$ to blue; $4, 5,$ and $6$ to yellow; $7$ and $8$ to red; and $9$ to green.

Q 6/6

Score 0

Alexis chose a random sample of $10$ jars of almonds from each of two different brands, $X$ and $Y.$ Each jar in the sample was the same size. She counted the number of almonds in each jar. Her results are shown in the plots. Based on the plots, which statement BEST compares the number of almonds in the jars from the two brands?

The number of almonds in jars from Brand $X$ tends to be fewer and more consistent than those from Brand $Y.$

The number of almonds in jars from Brand $X$ tends to be greater and more consistent than those from Brand $Y.$

The number of almonds in jars from Brand $X$ tends to be greater and less consistent than those from Brand $Y.$

The number of almonds in jars from Brand $X$ tends to be fewer and less consistent than those from Brand $Y.$

6 questions

Q.Josephine owns a diner that is open every day for breakfast, lunch, and dinner. She offers a regular menu and a menu with daily specials. She wanted to estimate the percentage of her customers who order specials. She selected a random sample of

50

customers who had lunch at her diner during a three-month period. She determined that

28\%

of these customers ordered from the menu with specials. Which statement about Josephine's sample is true? (*NO CALCULATOR*)

60 sec

7.SP.A.1

Q.The spinner shown is divided into

8

equal sections. The arrow on this spinner is spun once. What is the probability that the arrow will land on a section labeled with a number GREATER than

3?

(*NO CALCULATOR*)

60 sec

7.SP.C.7.A

Q.Reagan will use a random number generator

1,200

times. Each result will be a digit from

1

6.

Which statement best predicts how many times the digit

5

will appear among the

1,200

results?

60 sec

7.SP.C.6

Q.Lori wants to design a computer simulation to study how many spins it takes to land on each color once. Using the digits

0

through

9,

she will assign a digit to each section of the wheel. Which option describes how the digits can be assigned?

60 sec

7.SP.C.8.C

Q.Lori designs a computer simulation with 25 trials and uses the data from the simulation to create a graph. The graph shows the relative frequency of the number of spins in her simulation to land on each color once. Using the graph, what is the probability that a player lands on each color once in less than 7 spins?

60 sec

7.SP.C.8.C

Q.Alexis chose a random sample of

10

jars of almonds from each of two different brands,

X

and

Y.

Each jar in the sample was the same size. She counted the number of almonds in each jar. Her results are shown in the plots. Based on the plots, which statement BEST compares the number of almonds in the jars from the two brands?

60 sec

7.SP.B.4

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