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This is the first of several mini-labs designed to teach you how to use StatCrunch. Later in the course, you will work on more complex labs where you will apply the StatCrunch skills you learned in these early mini-labs.

Progress Check

Use this activity to assess whether you and your peers can:

Select an appropriate bin width for a histogram and explain your choice.
Use a histogram to describe the shape, center, and spread of a distribution of data.

Directions

Use the drop-down menu to learn about the three steps needed to complete this assignment.

Three steps to complete the assignment

Step 1: Review the Rubric

Before you submit your work, review the rubric at the bottom of this assignment.
Use the rubric as a checklist to determine whether you are ready to submit your work.

Step 2: First Draft

Commit a good-faith effort to address each item in the Prompt section below.
Please be sure to number your responses and include “white space” between problem numbers. This improves the readability and flow of your work. I cannot give feedback and grade jumbled work.
Use either of the following options to submit your work.
OPTION 1: You can submit a text-entry assignment (i.e. typing your answers in Canvas). To learn how to submit a text-entry assignment, use these (opens in a new tab).
OPTION 2: You can upload your paper-and-pencil work (or the digital equivalent). To learn how to upload your paper-and-pencil work, use these (opens in a new tab). WARNING – some file types may not be visible on my end. So to learn which files you can upload, be sure to use the directions link I provided for this option.
Not ready to submit a good-faith effort yet? Avoid frustration – use the link to the Questions, Answers, & Tips discussion board (at the bottom of this page) to post questions about this assignment (or visit the discussion board to answer your classmates’ questions). You can also contact me directly (see the homepage for my contact information).

Step 3: Optional Final Draft

After you submit your good-faith attempt to fully respond to the questions in the Prompt section below, advance to the ANSWER(S) page.
You can use the ANSWER(S) page to correct your work and resubmit this assignment any time before I begin grading the problems. However, to earn full credit, you are not required to submit a final draft for this assignment. But if you do submit a final draft, I will only grade it if you submitted a good-faith effort on your first draft.
Warning – I will only grade your most recent submission. So if you choose to submit a final draft, please do not leave anything out, and please do not direct me to read an earlier submission. To maximize your score, your most recent submission (at the time I begin grading) must be complete.

Context

We will use our unique IAT data sets to learn how to create a histogram using StatCrunch. We will also practice what we’ve learned about describing a histogram. We are interested in describing the distribution of IAT participants’ ages when they took the IAT test.

Data

All directions in this assignment open in a new tab.

Login and open StatCrunch ().
Open your IAT sample data set in StatCrunch ().
Create a histogram of the ages of the IAT participants ().
Download the StatCrunch output window, your histogram ().

Prompt

In your initial post, respond to the following prompt. But first, be sure to complete the work in the Data section above.

Question 1

Describe the distribution of IAT participants’ ages in your sample. Your description should include: shape, center, spread, a typical interval of representative ages, and any apparent outliers (unusual ages). Be sure to embed your histogram in the textbox along with your response – and include the Alt Text (). Please do not submit your histogram as an attachment.

Question 2

Create a second histogram for the distribution of ages, and adjust the bin width (). Try both smaller and larger bin widths. Choose a bin width so that your second histogram does not look like the first. Also, embed your second histogram in the textbox with your response. Indicate which histogram is better for analyzing the data (your first embedded histogram or your second). Explain why.

Question 3

Your random sample was obtained from the population of participants for your chosen IAT data set. Based on the histogram from your random sample, how would you describe the population of participants for your chosen IAT data set? Do you think the IAT population is similar to the U.S. population?

List of StatCrunch Directions

Click here for StatCrunch Directions

Each link will open in a new window. To return to this assignment, either close the new tab or select the tab for this assignment.

(You only need to do this once.)
(open your random sample)
(no screenshots; please use these directions)
(no attachments; please use these directions)

Here is a PDF document with all .

Module 7 Discussion Board

Use the Module 7 (opens in a new tab) to ask questions or provide feedback about the problems in any Module 7 activity – including this peer-reviewed assignment.

Review Feedback

Instructor feedback is only available after an assignment is graded.
Use these (opens in a new tab) to learn how to review feedback.

Click the “Next” or > button to continue.

Content by Cuyamaca College math faculty and licensed under the .

Rubric

Formative Assessments w/ StatCrunch

Formative Assessments w/ StatCrunch
Criteria	Ratings	Pts
This criterion is linked to a Learning OutcomeAnswering the Prompt	8 ptsFull CreditThe first submission demonstrates a good-faith effort to address each part of the Prompt. Either in the first draft or the optional final draft, all parts of the “Prompt” are addressed and the responses demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. The answers are correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow.6.5 ptsMostly CorrectThe first submission demonstrates a good-faith effort to address most of the Prompt. In the optional final draft all parts of the “Prompt” are addressed, and the responses demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. The answers are mostly correct. The writing/work is clear. The explanation/work is reasonable, well-organized, and easy to follow. 3.5 ptsOne or more incorrectThe first submission demonstrates a good-faith effort to respond to a smaller portion of the Prompt. In the first draft or the optional final draft, one or more parts of the “Prompt” are not addressed or are incorrect. Or, answers do not demonstrate attainment of the learning objectives in the “Progress Check” section of the assignment. Or, answers are correct, but the writing/work is unclear, incorrect, or difficult to follow.0 ptsNo MarksThe first submission does not demonstrate a good-faith effort to address the Prompt.	8 pts
This criterion is linked to a Learning OutcomeStatCrunch	2 ptsFull CreditStatCrunch graphs and/or tables are correct and embedded with your work.1 ptsPartial CreditStatCrunch graphs and/or tables are incorrect or missing important information. 0 ptsNo CreditNo StatCrunch information is embedded with your post. Or all StatCrunch work is incorrect.	2 pts

Total Points: 10

Requirements: 6 h

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