# Homework 2

Name: _____________________

Use the same data used for homework 1 (QLDiab.sav or QLDiab.xlsx) and output generated for HW 1.

Determine the summary statistics for the three variables in the data file.

Here are the options for statistics you should pick:

Post the output table for the summary statistics for the three variables here:

1. For the gender variable, what is the appropriate measure of central tendency and what is the value for it?

1. For the time variable, what are the two appropriate measures of central tendency and what are the values?

1. For the Quality of Life variable, what are the appropriate measures of central tendency and what are the values?

1. Answer the following for the Quality of Life variable:
2. Define the mean and provide the value of the mean.
3. Define the median and provide the value of the median.
4. What is the value of the skewness coefficient and what does it say about the skewness of the                 distribution?
5. How does the comparative relationship of the mean and median relate to the skewness        coefficient?
6. It what way does the histogram found in HW1 confirm the skewness?
7. What does the kurtosis coefficient tell about the peakedness of the distribution?

g  Define the variance and provide the value for it.

1. Define the standard deviation and provide the value for it.
2. Verify the relationship between variance and standard deviation.
3. Add and subtract 3 times the standard  deviation from the mean and provide those values.    Discuss why these values are reasonably expected.

Last Updated on February 8, 2018