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Unit 7 Day 5 Ch 9 Sampling & Bias RE-Quiz

Last updated over 4 years ago
18 questions
4

How many turnovers occurred in the NFL playoff game between the Packers and the Buccaneers?

Is this a statistical question?

4

How much do the students in our class spend on lunch each day?

Is this a statistical question?

4

How many students take Mrs. Nosal's Grade Level Statistics class this year?

Is this a statistical question?

4

What types of pets do Algebra 2 students have?

Is this a statistical question?

4

Use the following information for #5 & 6
The website www.gamefaqs.com asked, as their question of the day, to which visitors to the site were invited to respond, 'Do you ever use emoticons when you type online?'
Of the 87,262 respondents, 27% said that they did not use emoticons.

The sample is all US adults.

4

In #5, is 27% a parameter or a statistic?

Explain.

4

Use this information for #7 - 10
For their class project, a group of statistics students decide to survey the student body of 1605 students at AHHS to assess the proportion of students that are in favor of the new STEM Center. Their sample of 200 contained 50 Freshmen, 50 Sophomores, 50 Juniors & 50 Seniors.

What is the population of interest in this survey?

4

What is the sample in this survey?

4

What is the parameter of interest in this survey?
(what are we interested in finding out? Read the given information carefully in #5)

4

What type of sampling method was used in #7?
Reread to make sure you are clear.

4

An amusement park has opened a new roller coastser. It is so popular tha tpeople are waiting for up to 3 hours for a 2 minute ride. Concerned about how patrons (who paid a large sum of money to enter the park and ride on rides) feel about this, they decide to survey park patrons.
Name the type of sampling plan they used in each of the following scenarios:

Draggable itemCorresponding Item
They randomly selected 25 patrons from each row of the ride (front, middle, back cars) through out the day, then surveyed those patrons.
Stratified
They assigned all patrons that purchased a ticket a number, then randomly selected 150 patrons from the list of those that purchased tickets.
Cluster
They randomly selected 5 rides in the park and surveyed everyone that rode those rides that day.
Systematic
They choose a randomly selected individual in the line, then survey every 10th person after that.
Simple Random Sample (SRS)
4

In a large city school system with 20 elementary schools the school board is considering the adoption of a new policy that would require students to pass a test in order to be promoted to the next grade level.

The PTA wants to find out if parents agree with this plan. They decide to put an ad in the newspaper, asking people to log their opinions on the PTA website.

Identify the primary source of bias in this situation.
Explain.

4

Two members of the PTA in #12 have proposed different questions to ask in seeking parents' opinions:

A: “Should elementary school-age children have to pass high-stakes tests in order to remain with their classmates?"

B: “Should schools and students be held accountable for meeting yearly learning goals by testing students before they advance to the next grade?”

Which question do you expect will elicit greater/stronger support for testing the students before advancing to the next grade?
Explain.

Select both answers.

4

What kind of bias is present in question #13?

4

Name the type of bias primarily present in the situations below:

Draggable itemCorresponding Item
At the next PTA meeting, survey every parent that attends to see how they feel about the testing.
Nonresponse Bias
Surveys are distributed to the families and friends of the PTA board members over a 2 month period and results are tabulated.
Undercoverage Bias
Surveys were sent home with the children at the elementary schools, requesting them to be returned with their children the next day.
Volunteer Response Bias
A survey was mailed to 5,000 parents of elementary school children in the school district, 1750 completed surveys were returned giving strong support to the testing.
Convenience Bias
5

Randomization in sample selection is very important in the collection of data to ensure the sample is representative of the population we are studying.

How is randomization included in each of the sampling methods?

Draggable itemCorresponding Item
Convenience Sample
There is no randomization in this method.
Stratified Random Sample
The subjects are each randomly chosen with a Random Number Generator. Each one has an equal chance of being chosen.
Cluster Sample
Subjects are first grouped by similar characteristics, then a set amount are randomly chosen from each group.
Simple Random Sample (SRS)
Subjects are grouped into smaller representative groups, then a set amount of groups are randomly chosen and each member of the group is surveyed.
Systematic
A random starting point is selected by a random number generator then every nth person is part of the sample
4

A music teacher wants to conduct a survey of practice time of his 75 students.
He wants to select an SRS of six students using a random number table.

Use the random number table below to select the numbers for the SRS of 6 students, begin with the second row.


Select the list of numbers that correspond to the six chosen students.

6

For your political science class, you'd like to take a survey from a sample of all the Catholic church members in your city. A list of churches shows 17 Catholic churches within the city limits. Rather than try to obtain a list of all members of all these churches, you decide to pick 3 churches at random.
For those churches you'll ask to get a list of all current members to survey and survey all members of the three churches.

Which statements are true? Check all that apply.