Psy 555 Homework 3

Chapter 2: #11, 19, *20*, 21, 28, 30, 35, 40, 48, 52 

*2.20*: a) as is

b) as is

c) as is

d) What do you call what you calculated in (b)? in (c)? 

1)  List 2 advantages and a disadvantage of each of the measures of central tendency. 

2)  Calculate the variance and standard deviation for the following sample: 

7  4  5  2  5  9  4  8  3  8 

3)  Calculate the variance and standard deviation for the following population: 

7  4  5  2  5  9  4  8  3  8 

4)  A population of N=40 scores has a mean of m=12.  What is ∑X for this population?