Assignment Help >> Applied Statistics
Statistical Methods Lab Assignment 
Please answer the following questions by using RStudio and show all work as dictated by the assignment guidelines. Final answers should be rounded to two (2) decimal places (where applicable).
Q1. A placement test is required for students desiring to take a statistics II course at a university. The instructor of the course studies the relationship between students' placement test score and final course score. A random sample of eight students yields the following data.
Placement score

38

90

95

51

86

74

60

57

Final course score

63

41

54

32

93

60

61

89

Test the claim of association (ρ_{s}) between placement score and final course score.
Q2. The age groups and observed favorite type of music of 668 randomly selected Concordia students are listed in the following table.
Age

Rock

Pop

Classical

1525

50

85

73

2535

68

91

60

3445

90

74

77

Test the null hypothesis that age and preferred music type are independent.
Q3. In a study of the effectiveness of physical exercise in weight reduction, 12 subjects followed a program of physical exercise for two months. Their weights (in pounds) before and after this program are shown in the table.
Before

162

190

188

152

148

127

195

164

175

156

180

136

After

157

194

179

149

135

130

183

168

168

148

170

138

Test the claim that the exercise program has no effect on weight.