WEEK TWO PRACTICE WORKSHEET
Week Two Practice Worksheet
Week 2 Practice Worksheet
a response to the following prompts.
The Wilcox & Keselman (2003) article from this week’s electronic readings discusses
two problems with measures of central tendency: skewness of the data and outliers.
Discuss each of these issues and how they affect measures of central tendency.
How do the sample mean and the population mean differ? What is the symbol for each
type of mean?
An expert reviews a sample of 10 scientific articles (
= 10) and records the following
numbers of error in each article: 0, 4, 2, 8, 2, 3, 1, 0, 5, and 7.
Compute the mean, median, mode, sum of squares (SS), the variance, and the
standard deviation for this sample using the definitional and computational
formulas. You may use Microsoft
data anlysis to compute these statistics
and copy your output into this worksheet.