I'm really confused about how to do the JB test and Lillertest for this question.

The height (cm) and weight (kg) for 100 students randomly selected from a middle school are provided below.

a) Plot the data and visually inspect them. Test whether they come from a normal distribution using both Jarque-Bera test (jbtest) and Lilliefors test (lillietest) at a significance level of 5%.

b) Based on these data, give both point estimates and 95% confidence intervals for the height and weight of all students.

Height/Weight

172 75

171 62

166 62

160 55

155 57

173 58

166 55

170 63

167 53

173 60

178 60

173 73

163 47

165 66

170 60

163 50

172 57

182 63

171 59

177 64

169 55

168 67

168 65

175 67

176 64

168 50

161 49

169 63

171 61

178 64

177 66

170 58

173 67

172 59

170 62

172 59

177 58

176 68

175 68

184 70

169 64

165 52

164 59

173 74

172 69

169 52

173 57

173 61

166 70

163 57

170 56

160 65

165 58

177 66

169 63

176 60

177 67

172 56

165 56

166 49

171 65

169 62

170 58

172 64

169 58

167 72

175 76

164 59

166 63

169 54

167 54

179 62

175 68

182 69

186 77

166 76

169 72

173 59

169 65

171 71

167 47

168 65

165 64

168 57

176 57

170 57

158 51

165 62

172 53

169 66

169 58

172 50

162 52

175 75

174 66

167 63

166 50

172 63

168 62

171 58

[William Rose]

@Henry Xu, this does not appear to be a Matlab question. It appears to be a homework question. I think you are more likely to get help elsewhere.

[Star Strider]

@William Rose — It would appear that @Henry Xu simply needs to read and understand the documentation for the two functions. No further help from us (or anyone else here) is required.

Answer 1

[Sai Sumanth Korthiwada]

Hi Henry,

Please go through the documentation of jbtest and lillietest to understand about those tests. You can also leverage the examples related to 'jbtest' and 'lillietest' here:

Hypothesis Tests - Examples

Hope this helps!