PSYC4700 Week 3 Assignment Latest 2023 January
PSYC4700 Statistics for the Behavioral Sciences
Week 3 Assignment
Central Tendency
Complete the following problems within this Word document. (Do not submit other files.) Show your work for problem sets that require calculations. Ensure your answer to each problem is clearly visible. (You may want to highlight your answer or use a different font color to set it apart.)
Submit the document to your instructor by Sunday, 11:59 p.m. central time.
Problem Set 3.1: Characteristics of the Mean
Criterion: Explain a distribution.
Instructions: Read the following and answer the questions.
Data: To study perception, a researcher selects a sample of participants (n = 12) and asks them to hold pairs of objects differing in weight, but not in size, one in each hand. The researcher asks participants to report when they notice a difference in the weight of the two objects. Below is a list of the difference in weight (in pounds) when participants first noticed a difference. Answer the following questions based on the data given in the table.
Difference in Weight
4 8
9 5
12 7
6 15
10 4
8 8
1. State the following values for this set of data:
a) Mean _______
b) Median _______
c) Mode(s) _______
2. What is the shape of this distribution? Hint: Use the values of the mean, median, and mode to infer the shape of this distribution. _____________
(Assignment continues on next page.)
Problem Set 3.2: Interpret Means in a Chart
Criterion: Interpret means in a chart.
Instructions: Read the information below and answer the questions.
Data: General life satisfaction across culture. Gilman and colleagues (2008) measured general life satisfaction in 1,338 adolescents from two individualistic nations (Ireland, United States) and two collectivist nations (China, South Korea) using the Multidimensional Students’ Life Satisfaction Scale (MSLSS). Mean participant scores on the MSLSS are given in the following table.
Mean MSLSS Scores by Nation and Gender
Nation Gender
Men Women
United States 4.39 4.61
Ireland 4.37 4.64
China 4.41 4.56
South Korea 3.92 3.78
1. Among which group was general life satisfaction lowest on average? __________________________
2. Among which group was general life satisfaction highest on average? __________________________
Problem Set 3.3: Understanding Standard Deviations in a Chart
Criterion: Interpret standard deviations in a chart.
Instructions: Read the following and answer the question based on the data in the chart.
Data: Acceptable height preferences. Salska and colleagues (2008) studied height preferences among dating partners. In their first study, they reviewed Yahoo Personals for heterosexual individuals living within 250 miles of Los Angeles, California, and recorded the acceptable range of heights for their dating partners. The following table lists some of the results.
(Assignment continues on next page.)
Preferences Women Men
M SD M SD
Shortest acceptable height, inches 68.9 2.6 60.6 3.7
Tallest acceptable height, inches 75.3 2.2 69.8 2.7
1. Overall, did men or women show greater variability in their responses? Explain.
Problem Set 3.4: Range, Variance, and Standard Deviation in Excel
Criterion: Calculate measures of variability in Excel from a group of raw scores.
Data: A sample of likes per post on Facebook: 45, 789, 16, 5, 486, 1, 87, 18, 48, 1
Instructions: Complete the following steps:
o Install the data analytics package in Excel.
o If you are unsure about how to do this, visit Load the Analysis Toolpak in Microsoft Excel, which has tutorials for both Windows and Mac. Used with permission from Microsoft.
o Enter the data above into Excel using the variable name Data. In cell A1, type the word “Data.” Then, enter the data above in cells A2 to A11.
o In the Toolbar, click Data Analysis, Select Descriptive Statistics, then click OK.
o Next to input range type: $A$2:$A$11
o Double check that summary statistics has a check next to it.
o Click OK. A new sheet will appear to the right with your data.
o Copy and paste the descriptive statistics table below.
o Highlight the range, mean, and standard deviation.
Problem Set 3.5: Range, Variance, and Standard Deviation in JASP
Criterion: Calculate measures of variability in JASP.
Data: Use Likes data set. This data set is a sample of likes per post on Facebook.
Instructions: Complete the steps below.
1. Download Likes data set. Double-click the icon to open the data set in JASP.
2. In the Toolbar, click Descriptives.
3. Select Likes and then click Arrow to send it over to the Variables box.
(Assignment continues on next page.)
4. Check Transpose descriptives table.
5. Select Statistics. In the menu that opens, check the boxes for Mean, Std. deviation, Variance, and Range. Deselect all other boxes.
6. Copy and paste the descriptive statistics table below.
7. Highlight the range, mean, and standard deviation.
8. Answer: Does your mean equal the mean calculated in Problem Set 3.4? __________
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