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Unit 7 Ch. 9 & 10 Partner Test

Last updated over 4 years ago
29 questions
1. This is a partner test. I am assessing your understanding level of the material we have covered.
2. The test should be done with only the assistance of your notes, class slide decks or the posted Ch. 9 & 10 slide decks and your partner. You should not request or accept the assistance of a friend, family member or neighbor. Submitting answers and/or work done by or with the assistance of someone else is grounds for an Academic Integrity write-up.
0

After reading the text above, select your response.

To be clear, selecting "No" does not free you of the consequences of your actions. Rather, it means I will disable your test until we can talk one-on-one so that you better understand before proceeding.

4

Suppose the City of San Antonio decides to randomly test high school lacross players in Bexar County for steriod use. There are 16 teams in the league, and each team has 20 players.
State investigators plan to test 32 of these athletes by randomly choosing two lacrosse players from each team.

What is the population of interest?

4

In #2, what is the sample?

4

Suppose the City of San Antonio decides to randomly test high school lacross players in Bexar County for steriod use. There are 16 teams in the league, and each team has 20 players.
State investigators plan to test 32 of these athletes by randomly choosing two lacrosse players from each team.

What type of sample method is this?

4

Suppose the City of San Antonio decides to randomly test high school lacross players in Bexar County for steriod use. There are 16 teams in the league, and each team has 20 players. State investigators plan to test 32 of these athletes by randomly choosing two lacrosse players from each team.

They found that 2 out of the 32 lacrosse players had been using steriods and needed to be removed from the team due to ineligibility. This equates to an estimate of 6.25% of the lacrosse players using drugs.

Is 6.25% a statistic or a parameter?
Explain how you know:

4

The local chapter of the National Honor Society offers after school tutoring, but the sessions are not well attended. Hoping to increase attendance, the tutors design a survey to gauge student interest in times, locations, and days of the week that students could attend tutoring sessions.
They choose 3 English classes at random, and have all of the students in each class take the survey.

What type of sample is this?

4

A polling organization is investigating public opinion about cloning. They phone a random sample of 1200 adults, asking each person one of these questions (randomly chosen):

A. "Should research scientists be allowed to use cloned human embryos in their experiments?"

B. "Do you favor allowing doctors to use cloned cells in attempts to find cures for such terrible diseases as Alzheimer's, diabetes, cancer and Parkinson's?"

Which question do you expect will elicit greater support for cloning?
Explain why.

4

Question #7 shows an example of what kind of bias?

6

A member of the City Council has proposed a resolution opposing construction of a new state prison there.
The council members decide they want to assess public opinion before they vote on this resolution.
Below are some of the methods that are proposed to sample local residents to determine the level of public support for the resolution.

Match each method with a sampling technique.

Draggable itemCorresponding Item
Randomly pick 50 voters from each election district.
Systematic Sample
Survey all the residents of the city regarding their opinion of a new state prison
Simple Random Sample (SRS)
Have the board of Elections assign each voter a number, then select 400 of them using a random number table.
Stratified Random Sample
Call every 500th person in the phone book
Judgment Sample
Go to a downtown street corner, a grocery store and a shopping mall, interview 100 typical shoppers at each location.
Census
Randomly pick several city blocks, then survey all the residents living on each block.
Cluster
4

Using the scenario from #9, another method was proposed:
place an announcement in the newspaper asking people to call their council representative to register thier opinions.
Council members will tally the calls they receive.

1. Explain why this method might be biased.
2. What types of bias might be present? (name them)
Use #8 for a list of the different types of bias.

4

Using the scenario from #9, another method was proposed: have each council member survey 50 friends, neighbors, or co-workers.
Council members will tally the results they receive.

1. Explain why this method might be biased.
2. What types of bias might be present? (name 2 of them)
Use #8 for a list of the different types of bias.

5

Match each study with its correct heading of 'Experiment' or 'Observational Study'.

All 5 studies need to be classified for full credit.

  • The weights of the football players at AHHS are compared to the weights of the basketball players.
  • Similar patients with diabetes are randomly given two different doses of a new drug or a placebo, they blood sugar levels are measured to determine the response.
  • Volleyball players at AHHS were randomly given a new sports drink or water before a game. Their electrolyte levels were measured after the game to determine their hydration level.
  • lncidences of hearing problems in people living near the Randolph Air Force Base were compared to those living in Alamo Heights & Terrell Hills.
  • To determine if property values were related to power outages during the cold weather in San Antonio during February of 20201, the number of people without power in different zipcodes(reflecting property values) were compared.
  • Experiment
  • Observational study
4

A consumer group wants to see if a new education program will improve the spending habits of college students improve the spending habits of college students.
36 high school students are randomly assigned to three different courses on spending habits.

Is this an observational study or an experiment?
Why?
Select the 2 answers that apply:

4

A consumer group wants to see if a new education program will improve the spending habits of high school students.
36 high school students are randomly assigned to three different courses on spending habits.

How many factor(s) are in this experiment?
What is it/ what are they?

4

A researcher identified 100 men over forty who were not exercising and another 100 men over forty with similar medical histories who were exercising regularly.
She followed all men for several years to see if there was any difference between the two groups in the rate of heart attacks.
This is a

3

Which of the following are critical parts of designing a good experiment?
Hint: the three principles of experimental design.

4

A researcher wants to compare the performance of three types of pain relievers (type A, B and C) in volunteers suffering from arthritis.
Because people of different ages may suffer arthritis of varying degrees of severity, the 48 subjects are first split into two groups: 20 that are under 60 and the rest are over 60.

Subjects in each group are then randomly assigned to take one of the medications.
Twenty minutes later they rate their levels of pain.

Which BEST describes this experiment?

4

Use the show your work section to draw a diagram of the experiment in #17:

4

Researchers plan to investigate the effects of a low sodium diet and a new medication that may reduce blood pressure for individuals with higher than average blood pressure.
120 volunteers with higher than average blood pressure are solicited.

Volunteers are randomly assigned to 100 mg of the medicine, 200 mg of the medicine or a placebo and are also randomly assigned a diet to follow: Low Sodium Diet or Control Diet

Blood pressure will be measured at the beginning and at the conclusion of the study.

Identify the subjects:

4

Researchers plan to investigate the effects of a low sodium diet and a new medication that may reduce blood pressure for individuals with higher than average blood pressure.
120 volunteers with higher than average blood pressure are solicited.

Volunteers are randomly assigned to 100 mg of the medicine, 200 mg of the medicine or a placebo
and are also randomly assigned a diet to follow: Low Sodium Diet or Control Diet

Blood pressure will be measured at the beginning and at the conclusion of the study.

Identify the factor(s):

4

Researchers plan to investigate a new medication that may reduce blood pressure for individuals with higher than average blood pressure.
120 volunteers with higher than average blood pressure are solicited.

Volunteers are randomly assigned to 100 mg of the medicine, 200 mg of the medicine or a placebo and are also randomly assigned a special diet to follow: Low Sodium Diet or Control Diet.

Blood pressure will be measured at the beginning and at the conclusion of the study.

Identify/list the levels for each of the factor(s) listed above:

4

How many treatments/treatment groups are there in #21?

4

Use the experimental study in #21.

List the treatments given to the volunteers (treatment groups):
Feel free to use abbreviations.

4

What is the response variable in the experiment in #21?

4

Using the scenario from #21, explain clearly the advantage of using a placebo in this experiment.

4

Using the scenario from #21, describe how random assignment was used in this experiment.
Explain clearly why this needs to be part of the experiment.

4

Using the scenario for #21:

How could blocking be used?
What would be the benefits of including blocking in this experiment?

Answer both questions for full credit.

6

Using the scenario in #21:
How is control part of this experiment?
What is the control group?
Why is control important?

Answer all three questions:

0

Those of you who are at home, learning remotely, do you have a pair of dice (2 dice) that you could use next week in class for some activities?
Maybe borrow them from a board game like backgammon?