Question

Generals		Warriors
Student	WAIS-IV Score	Student	WAIS-IV Score
1	105	1	93
2	81	2	90
3	102	3	87
4	90	4	109
5	95	5	106
6	110	6	104
7	90	7	109
8	100	8	104
9	80	9	115
10	90	10	112
11	84	11	112
12	81	12	100
13	90	13	97
14	107	14	90
15	101	15	104
16	90	16	107
		17	101

A. Complete the group frequency table.

Score            The Generals (f)             The Warriors (f)

80-89

90-99

100-109

110-119

B. Next, find the following for each team:

                                 Generals (f)                     Warriors (f)

Mean
Median
Mode
N
N-1
ΣX
(ΣX)2
ΣX2
S2X
SX
s2X
sX

c. What is the shape of distribution for the Generals? For the Warriors?

d. What is the range of scores that encompasses approx 68% of the scores surrounding the mean for EACH team?

e. Which distribution has a larger spread of scores? Why?

Answer 1

Mean - It is determined by adding all the data points in a population and then dividing the total by the number of points.

Median - To find the median, we arrange the observations in order from smallest to largest value. If there is an odd number of observations, the median is the middle value. If there is an even number of observations, the median is the average of the two middle values.

Mode - The mode is found by collecting and organizing data in order to count the frequency of each result.

N - Total no of observations

ΣX = Sum of all observations

(ΣX)2 = Square of Sum of all observations

S²_X = Population Variance

S_X = Population Standard Deviation

s²_X = Sample Variance

s_X = Sample Standard Deviation​​​​​​​