1,Suppose a population has a mean of =45 and a standard deviation of =10. Also suppose 10 is added to every score in the population, select the new values from among the options below for the mean and standard deviation.

a.=55 and =10

b.=55 and =20

c.=45 and =20

d.=45 and =10

2. Find the mode of the frequency distribution given below.

Class Limits	Frequency
39.9-42.8	2
42.9-45.8	6
45.9-48.8	10
48.9-51.8	14
51.9-54.8	8
	40

The Mode is:

a.

49.05

b.

51

c.

50.15

3.What is the standard deviation for the following set of scores: 20, 24, 26, 22, 18, 16, 18?

a.6.55

b.24

c.12.9

d.3.60

4.Which numerical measure is a measure of spread?

a.Mode

b.Standard deviation

c.Median

d.Mean