Estimating Population Proportions

Estimating Population Proportions

Assessment

Interactive Video

Mathematics

6th - 7th Grade

Hard

Created by

Thomas White

FREE Resource

In this lesson, Mr. Holcomb explains how to estimate a population proportion using sample data. The video covers calculating the mean of sample proportions, constructing dot plots, and interpreting results. Two examples are provided: one involving seventh graders estimating the proportion of vegetarians, and another using survey data from Roosevelt Middle School. The lesson emphasizes the importance of sample size and variability in estimating population proportions.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main focus of this lesson?

Estimating a population proportion

Understanding algebraic expressions

Calculating the mean of a dataset

Learning about geometric shapes

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In Example 1, what was the sample size each seventh grader used?

20 students

15 students

10 students

25 students

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How close was the calculated mean of the sample proportions to the actual population proportion?

Exactly the same

Very close, off by 0.003

Not calculated

Significantly different

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was the actual population proportion of vegetarians in the middle school?

0.10

0.15

0.20

0.25

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does a sample proportion of 15% indicate in the context of the vegetarian survey?

15 out of 20 students are vegetarians

10 out of 20 students are vegetarians

5 out of 20 students are vegetarians

3 out of 20 students are vegetarians

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the shape of the distribution in the dot plot constructed from the sample proportions?

Skewed left

Skewed right

Symmetrical mound-shaped

Uniform

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In Example 2, what superpower was being estimated for preference?

Freeze time

Invisibility

Super-strength

Telepathy

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