DSRT_734 Quiz 2

I’m stuck on a Computer Science question and need an explanation.

Need a detailed statistics report on both questions!

1.A researcher wanted to know if a particular brand was preferred by different age groups. The researcher observed the data below. Is there a relationship between age and brand?

Brand A

Brand B

Brand C

Under 30

120

130

110

30 – 50

77

127

140

50 and older

84

100

98

a.Which test are you using?

b.What are your H0 (null hypothesis) and Ha (alternative hypothesis)?

c.Calculate your statistic.

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

e.Write a one to two sentence conclusion that correctly responds to the question.

2.School leadership teams would like to know if there is any correlation between an athlete’s grade and the number of days missed for events. Use the chart below to give your conclusion.

Grade

Classes Missed

75

2

90

4

45

8

47

4

90

1

100

0

93

1

85

0

77

5

94

6

42

6

40

7

73

4

64

5

70

3

59

3

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