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[2022] Using the data set that you created for the Week 1 Discussion, we will look at descriptive statistics in the week’s discussion. We will look at the measures of center, mean median, and mode, and the measures of variability, variance, standard deviation and range

Week 2 Discussion: Descriptive Statistics

Using the data set that you created for the Week 1 Discussion, we will look at descriptive statistics in the week’s discussion. We will look at the measures of center, mean median, and mode, and the measures of variability, variance, standard deviation and range. In addition, we will look at the shape of the data distribution (skew).

To prepare for this Discussion:

  • Review the Week 2 Discussion resources.
  • You may need to modify the data set you created for the Week 1 Discussion.  You will need to have two quantitative variables that are related for which you will find the mean, median, variance, and standard deviation. If you need to add a variable to your scenario, explain what it is, add it to your data set, and post it in your Discussion.

Example: Recall from the Week 1 Discussion, I had data relating gender, weight, and systolic blood pressure. My two quantitative variables are going to be systolic blood pressure for men versus women. I sorted males and females into two tables and the results are below. For this Discussion, I would compare the mean, median, variance, and standard deviation of systolic blood pressure for men and women.

Gender Weight (lb.) Systolic Pressure (mm Hg)
M 150 144
M 225 140
M 250 113
M 275 128
M 235 138
M 267 116
M 145 132
M 285 126
Gender Weight (lb.) Systolic Pressure (mm Hg)
F 110 100
F 125 98
F 150 94
F 176 128
F 136 88
F 178 130
F 112 100
  • Review the rubric that will be used for grading.

With these thoughts in mind:

By Day 4

Post a 2- to 3-paragraph response that includes the following information:

  • Your data set including any modifications, if necessary.
  • The mean, median, variance, and standard deviation calculations for your quantitative variables from Statdisk. You will want to paste these into your Discussion and cite these as evidence in the next parts of the Discussion.
  • Discuss the measure of center for the data by comparing the mean and median of the two variables and write a conclusion sentence about the results. For your data set, would the mean or median be the best measure of center and why?
  • Discuss the measure of variability for the variables by comparing either the variance or standard deviation and write a conclusion about the results. What do your results tell you about the spread of the data?
  • Discuss the shape of the distribution for the two variables (left skew, right skew, symmetrical) supported with data. Look at the graphic on page 130 in the textbook. In addition to the results from Statdisk, you might want to create a histogram to show the skew for the variables.
  • Post what you found most interesting in this week’s Discussion and why you found it interesting. Was it a topic that would apply to your degree field?

By Day 6

Respond to at least two of your colleagues’ postings in one or more of the following ways:

  • Ask a probing question.
  • Share an insight from having read your colleague’s posting.
  • Offer and support an opinion.
  • Validate an idea with your own experience.
  • Expand on your colleague’s posting.

Return to this Discussion in a few days to read the responses to your initial posting. Note what you have learned and/or any insights you have gained because of the comments your colleagues made.

Late Policy: Discussion is an interactive learning environment and all discussion posts must occur within the week within which they are relevant. Posts submitted late but within the week in which they are relevant may be penalized at the instructor’s discretion.

Click on the Reply button below to reveal the textbox for entering your message. Then click on the Submit button to post your message.

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