Week 3 calculate and interpret data

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This assignment has two parts, which will be submitted in one document.

For this task, you will calculate the mean, median, and mode for a fictitious data set. These data represent the results of a fictitious study, which investigates whether a new drug (Drug A) is more effective than a placebo (i.e., an inactive substance) in the treatment of depression. The researcher is also interested in whether the effects of the drug varies by age so participants between the ages of 18-39 years were recruited (the younger adult group), and participants between the ages of 60-80 years were recruited (the older adult group). Participants were randomly assigned to either the placebo group or to the drug group (Drug A). All participants were first screened to ensure they met the criteria for depression. After 2 months of taking either the placebo or Drug A, participants returned to the lab and completed a measure of depressive symptomology called the Beck Depression Inventory-II (BDI-II).

Part 1:

For the first part of this assignment, create a table showing the mean, median, and mode for each participant group and each drug condition on the score for the BDI-II. The data for each participant are contained in the “Participant Data” worksheet in the Data1 File. You may use Excel or you can calculate these values by hand. Your table should look like the following:

I attached a picture of the table should look like..  

You must have the “Data Analysis” add-in installed. Directions for this installation are provided in the “Data Analysis in Excel 2016” file located under your weekly resources. These instructions will also work for Excel 2010. This document also describes how to calculate basic descriptive statistics using Excel.

Part 2:

For this part of the assignment, create a bar chart in Excel. You will need the “Summary Data for Graph” worksheet from the Data 1 file. Remember, the bar chart shows the means for each condition rather than individual participant data, and the data in this worksheet have been organized accordingly.

For the steps regarding how to create the bar graph, review the steps in “Creating a Bar Graph in Excel 2016” or “Creating a Bar Graph in Excel 2010,” located under your weekly resources. These instructions should also work with other versions of Excel.

You should copy and paste the graph you create into a Word document, along with your table showing the mean, median, and mode.

Length:1-2 pages

Your graph and table should demonstrate thoughtful consideration of the ideas and concepts presented in the course by providing new thoughts and insights relating directly to this topic. Your response should reflect scholarly writing and current APA standards.

links sent by my teacher 



Participant ID Participant Condition Score on the BDI
Mean 15.5 Mean 1.5 Mean 18.0666666667
Standard Error 1.6072751268 Standard Error 0.0928476691 Standard Error 2.1474033147
Median 15.5 Median 1.5 Median 17
Mode ERROR:#N/A Mode 1 Mode 23
Standard Deviation 8.8034084308 Standard Deviation 0.5085476277 Standard Deviation 11.7618123555
Sample Variance 77.5 Sample Variance 0.2586206897 Sample Variance 138.3402298851
Kurtosis -1.2 Kurtosis -2.1481481481 Kurtosis -1.121449591
Skewness 6.56289472684822E-17 Skewness 4.10180920428014E-17 Skewness 0.2034833612
Range 29 Range 1 Range 41
Minimum 1 Minimum 1 Minimum 0
Maximum 30 Maximum 2 Maximum 41
Sum 465 Sum 45 Sum 542
Count 30 Count 30 Count 30

Participant Data

Participant ID Age Group Participant Condition Score on the BDI
1 young placebo 18
2 young placebo 23
3 young placebo 33
4 young placebo 23
5 young placebo 35
6 old placebo 31
7 old placebo 29
8 old placebo 23
9 old placebo 18
10 old placebo 30
16 young Drug A 16
17 young Drug A 10
18 young Drug A 8
19 young Drug A 10
20 young Drug A 8
21 old Drug A 20
22 old Drug A 25
23 old Drug A 24
24 old Drug A 26
25 old Drug A 22

Summary Data for Graph

Placebo Drug A
Younger Adults 26.4 10.4
Older Adults 26.2 23.4

How to Add the Option for Data Analysis to Excel 2016

Complete the following steps to add the option for data analysis to Excel 2016.

1. Open Excel 2016.

2. Click “File.”

3. Click “Options.”

4. Select “Add-ins” from the list of Options that appear on the left side of your screen.

5. In the “Manage” area, click “Go.”

6. The following screen will appear. Then, make sure that Analysis ToolPak and Analysis ToolPak – VBA are checked.

7. Click OK.

The “Data Analysis” area will now appear in the “Data” tab. This is the last option in this row and to the right of “Outline”:

8. Click on “Data Analysis” to view the options for inferential statistical tests, as well as options for descriptive statistics:

9. Select the “Descriptive Statistics” option; then, complete the following field:

The “Input Range” consists of the cells you want included in the analysis. To obtain the means for each age group and drug condition, be sure to select each set of BDI scores separately (i.e., younger adults in the placebo group, older adults in the placebo group, younger adults in the Drug A group, older adults in the Drug A group).

10. Click OK.

Creating a Bar Graph in Excel 2016

The means for each group are included in a bar graph and not individual participant data. Be sure to use the data in the “Summary Data for Graph” worksheet contained in the Data 1 workbook. The means have already been calculated and organized appropriately for each condition.

To create a bar graph in Excel 2016, complete the following steps:

1. Select all the data (Columns A, B, and C; Rows 1, 2, and 3):

2. Click “Insert” and then click on the arrow next to the “Insert Column or Bar Chart” option:

3. Select “2-D Column.” When you click on “2-D Column, ” a bar chart will be created for you. Be sure to format the chart appropriately. The chart should be selected; if it is not selected, click on the chart and you will be presented with formatting options in the “Design” tab. On the far left is an option called “Chart Layouts” and within that is the “Quick Layout” option. Click on the arrow to view the variety of options available to you.

4. Select “Layout 5” because it gives you the option to label the x-axis and y-axis and allows labels for the levels of the independent variable. The independent variable is called “Drug Condition” and the two levels are “Placebo” and “Drug A.”

The text “Axis Title” constitutes text boxes and you can click on to change the label for the x-axis and y-axis; remember, the BDI score is on the y-axis and the name of the independent variable is along the x-axis.

You have the option to remove the horizontal lines that appear across the graph. You can remove those lines by clicking on one of the lines, which should select all lines. Then, you can press the delete key on your computer to remove lines.

You can also change the font type and size of the font by selecting the entire graph and then selecting the appropriate font style and size.


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