PSY 325 Week 1 DQ 1 Data Analysis Recent

Data Analysis. For this discussion, you will organize data sets into meaningful number groupings, calculate basic descriptive values, and communicate written critiques of statistical analyses.

This exercise requires the use of a descriptive statistics calculator. You can find this tool in some versions of Excel (as part of the Analysis ToolPak) or you can use one of the many free online descriptive calculators such as the Descriptive Statistics Calculator by Calculator Soup.

To begin, come up with 20 different data points (that will form a set of data) and enter them into the first column of an Excel spreadsheet. The data points can be any numbers you want as long as there are 20 of them.

You will then use the descriptive statistics option in your descriptive statistics program or calculator. This is explained in Chapter 1 of your course text. You should get an output similar to the image in Figure 1.1.

This output must contain the following values: mean, standard error, median, mode, standard deviation, sample variance, kurtosis, skewness, range, minimum, maximum, sum, and count. Address the following points in your initial post:

•   Begin your discussion by reporting your results for each of the values listed above.
•   Based on this output, which single value best describes this set of data and why?
•   If you could pick three of these values instead of only one, which three would you choose and why?  It is important to note that the answers to these questions may be different for each of you since you are each using unique sets of data.  

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PSY 325 Week 1 Quiz Set 1

1. Question : Frequency polygon is to line graph as _________ is to bar graph.

2. Question : The relative frequency of the scores in a class interval = .25. What does that mean?

3. Question : How is a frequency polygon different from a bar chart?

4. Question : Values that indicate the relevant characteristics of a group to be studied are ___________.

5. Question : To calculate mean, at least ordinal data are required.

6. Question : Which statistic is always based on just two values?

7. Question : Which statistic indicates the most frequently occurring number in a set?

8. Question : A distribution with s = 4 and R = 12 is leptokurtic.

9. Question : Once the range is established, no additional value can make it smaller.

10. Question : “Class intervals” in data arrays serve what purpose?

PSY 325 Week 1 Quiz Set 2

1. Question : In a group of students where most are female, Mo = female.

2. Question : Values that indicate the relevant characteristics of a group to be studied are ___________.

3. Question : In statistics, a population refers to which of the following?

4. Question : Compared to a normal distribution, a ___________distribution appears to be “tall and skinny” whereas a __________distribution is “low and fat.”

5. Question : Which of the following is not a measure of central tendency?

6. Question : Which statistic indicates the middlemost value in a distribution?

7. Question : Grouping people by their ethnic group membership constitutes data of what scale?

8. Question : In statistics, the term average is used to signify only the mean.

9. Question : If there are several mathematical operations in a formula, which comes first?

10. Question : A distribution with s = 4 and R = 12 is leptokurtic.