One sample t-Test

The superintendent of the Riverwalk school district claims that the students in his district are more intelligent, on the average, than the general population of students. The mean IQ of the general population of school children is 105. A study was conducted to determine the IQs of a sample of school children in the Riverwalk district. The results are as follows. Test and find out if the superintendent of the Riverwalk is correct. (Both manual calculation and SPSS)

 

Student

IQ score

Student

IQ score

1

110

16

110

2

105

17

117

3

102

18

98

4

112

19

124

5

120

20

107

6

107

21

112

7

99

22

122

8

100

23

104

9

109

24

105

10

103

25

110

11

115

26

120

12

125

27

125

13

115

28

120

14

106

29

100

15

110

30

110

 

 

Answer t(obtained)=3.9

            SPSS output:sig=.001