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'I C grade I Classwork for X Dashboard X Dalton 2021- X | B S.Y. 2021-2021 x I Untitled docu x classroom.google.com/w/MzkyNj12NDEyMDQ1/t/all 4 Problem Set 2 x Dalton 21-2' IV. Decision: Since tc (0.694) is less than the critical value (1.895), do not reject Ho. V. Conclusion: There is not enough evidence that the new serum is effective. What's More Activity 2: More Tests! Solve the problems. 1. A spelling test administered to two groups of Grade 9 students is shown below. If the scores are normally distributed, test if there is a significant difference in the result of the spelling pdf test at a = 0.05. Group A Group B 16 14 12 12 10 8 8 14 7 6 4 4 6 12 4 2. A researcher wanted to determine if a new drug effectively lowers glucose levels in the blood of 15 diabetic patients. He took the glucose levels of the patients then administers the drug and after two hours took again the glucose levels of the patients. The results are shown below. Before 240 180 160 195 203 220 178 158 224 176 226 190 187 165 After 225 187 160 190 180 188 185 172 190 170 190 176 195 165 Is there enough evidence to conclude that the new drug is effective n lowering blood glucose levels? WELS-OBE o MEL C -Aligned Module Basic Sta tistics Type here to search 10 270c 9:30 pm ENG 30/06/2022