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.
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.
Determine if each of the following is a valid statistical question.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
How much money does Mrs. Nosal carry with her to school? | arrow_right_alt | Statistical Question. |
How much money do high-school students at AHHS carry with them to school? | arrow_right_alt | Nonstatistical question. |
Explain your Statistical Question answer to #2.
A furniture maker busy hardwood in large batches. They supplier is supposed to dry the wood before shipping. The furniture maker chooses 5 pieces of wood from each batch the comes in a shipment and tests their moisture content.
If any piece exceeds 12% moisture content, the entire batch is sent back.
Identify the population and the sample in this context.
An educator wants to compare the effectiveness of computer software for teaching biology with that of a textbook presentation.
She gives a biology pretest to each group ofhigh school juniors, then randomly divides them into two groups.
One group uses the computer and the other group studies the text. At the end of the year, she tests all the students again and compares the increase in biology test scores in the two groups.
Is this an observational study or an experiment?
Explain your reasoning.
If it is an observational study, is it retrospective or prospective?
Select BOTH answers.
You have probably seen the mall interviewer, clipboard in hand, approaching people passing by.
Explain why even a large sample of mall shoppers would not provide a trustworthy estimate of the current unemployment rate in the city where the mall is located.
Using the information from #6, is the proportion of unemployed people in the sample likely greater than or less than the proportion of all people who are unemployed in the city?
What type of bias is primarily present in the Mall Scenario of #6?
How would you change the scenario to avoid the type of bias you chose in #8?
Luke wants to know what percent of students at AHHS have a driver's license. He surveys all the students in his statistics class and finds that 68% of the students in his sample have a driver's license.
What kind of a sample is this?
Explain why the sampling method in #10 is biased?
Is 68% likely to be too high an estimate or too low?
Explain why.
Explain how Luke can avoid the bias described in #11 and create a more representative sample of AHHS students.
The school's newspaper is planning an article on family friendly palces to stay over spring break at a nearby beach town. The editors intend to call 4 randomly chosen hotels to ask about their amenities for families with children. They have an alphabetized list of 28 hotels in the town.
Describe how to select an SRS of 4 hotels using slips of paper.
The school's newspaper is planning an article on family friendly palces to stay over spring break at a nearby beach town. The editors intend to call 4 randomly chosen hotels to ask about their amenities for families with children. They have an alphabetized list of 28 hotels in the town.
Describe how to select an SRS of 4 hotels using a random number generator.