Statistics Biased

Statistics Biased

7th Grade

20 Qs

quiz-placeholder

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Statistics Biased

Statistics Biased

Assessment

Quiz

Mathematics

7th Grade

Practice Problem

Hard

Created by

Anthony Clark

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The Student Council asked every tenth student in the lunch line how they preferred to be contacted with school news. The results are shown in the table. Is this an unbiased sample? If yes, suppose there are 684 students at the school. How many can be expected to prefer E-mail?

No, it's a biased sample

432

304

16

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

To determine the number of umbrellas the average household in the United States owns, a survey of 100 randomly selected households in Arizona is conducted. Of the households, 24 said that they own 3 or more umbrellas. The researcher concluded that 24% of the households in the United States own 3 or more umbrellas. Is the this a valid conclusion? Justify your answer.

Valid. The sample is biased.

Not valid. The sample is biased.

Valid. The sample is unbiased.

Not valid. The sample is unbiased.

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is this sample biased or unbiased?


A sample of 50 students who currently have an A in math.

Biased

Unbiased

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Is this sample biased or unbiased?


A sample of 50 randomly selected students.

Biased

Unbiased

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is: A group from a population that does not accurately represent the entire population.

biased sample

compound event

population

dependent

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Which of these statements best describes a biased sample?

It is very small.

It is not randomly chosen.

It results in incorrect predictions.

It does not accurately represent the population.

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Tanya wants to know the percent of people likely to attend the upcoming musical at school. She asks each person in the musical how many people they know who are coming to make a prediction. Why is this sample biased?

Drama students are more likely to lie.

Musicals are better attended than plays.

The drama teacher was not asked.

The sample is not random and not representative of the entire school population.

Answer explanation

The sample is not random and not representative of the entire school population, as it only includes people involved in the musical, leading to bias.

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