Sampling Inference
Authored by Anthony Clark
Mathematics
7th Grade
CCSS covered
AI Actions
Add similar questions
Adjust reading levels
Convert to real-world scenario
Translate activity
More...
Content View
Student View
9 questions
Show all answers
1.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Maria collects data from a random sample of 7th graders in her school and finds that 16 out of 20 7th graders participate in after-school activities. How many students should Maria expect to participate in after-school activities if 240 total 7th graders attend Maria's school? Write the numerical answer only.
(a)
Tags
CCSS.7.RP.A.3
2.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
A movie theater randomly samples the types of admission tickets sold on Friday in the afternoon and the evening. If 400 tickets are sold on a Friday afternoon, use your inference and proportional reasoning skills to determine how many of those 400 tickets would be adult tickets. Type your numerical answer only.
(a)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Trinity asked a random sample of 50 students at her school if they brought lunch from home today. If 30 answered “yes,” about what percent of students at Trinity’s school brought lunch from home today?
15%
30%
50%
60%
4.
MULTIPLE SELECT QUESTION
1 min • 1 pt
A representative sample of 80 customers in a clothing store was surveyed about how they paid for their purchases. The table shows the responses. Based on the results, which of the following are valid inferences. Select all that apply.
Tomorrow, 8 out of the first 80 customers will for sure pay with a gift card.
In a group of 40 customers, it is expected that about 10 will pay with cash.
About 0.3, or 30%, of all the store's customers will pay with a credit card.
A sample of 100 customers would provide less reliable data.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Yadira wanted to estimate the mean number of words per page in a 180-page book she is reading. Which if these sampling methods gives the best estimate of the mean word count per page in the book?
Count the words on one randomly chosen page.
Calculate the mean word count for a sample consisting of the pages with pictures.
Calculate the mean word count for a sample of 20 pages selected by choosing every 9th page.
Calculate the mean word count for a sample consisting of the 10 pages that appear to have the most words.
6.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Using your inference skills and proportional reasoning, predict the number of purple jellybeans in a bag of 200 total jellybeans if a random sample of 25 resulted in 4 purple jellybeans. I predict there will be (a) purple jellybeans.
7.
FILL IN THE BLANKS QUESTION
1 min • 1 pt
Johanna was running for class president. She wanted to know if she had a good chance of winning the election, so she decided to have her classmates help her with surveys. Michael surveyed a random sample of 10 students from the school. 7 of them said they would vote for Johanna. If there are 230 students in the school, and all of them vote, what is Michael’s best estimate of the number of students who would vote for Johanna? (a) students
Access all questions and much more by creating a free account
Create resources
Host any resource
Get auto-graded reports
Continue with Google
Continue with Email
Continue with Microsoft
or continue with
%20(1).png)
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?
