Reference no: EM132479332

Mr. Jones wanted to check if there was an observable impact of a particular worksheet on his students' test scores for Chapter 1. His idea was to test if there was a significant variation in the average test score of the class that used the worksheet in comparison to the class that did not. In the class before lunch, he used the worksheet but not the class after lunch. He has 23 students in each of the two classes. Their test scores are below:

Before Lunch:

86

79

59

45

98

67

81

80

32

72

35

84

31

60

57

20

68

43

24

16

31

58

82

After Lunch:

23

67

74

46

38

90

14

79

38

63

51

38

18

56

44

70

27

33

16

14

24

30

95

a. Test are using?

b. H0 (null hypothesis) and Ha (alternative hypothesis)?

c. Calculate the statistic.

d. Decision does this inform to make and why? ( may use the critical value in the chart or the calculated p-value, but must indicate what are doing.)

e. Conclusion that correctly responds to the question. report statistic ex. [(df)=1.1, p<.05]