## Question

###### Examgle 11 Two machines Aand B, are used to pack biscuits. A sample of 10 packets was taken from each machine and the mass of each packet; measured to the nearest gram, was noted. Find the standard Deviation of the masses ofthe packets taken in the sample from each machine Which machine, do you think, is more reliable? Explain your answerMachine A (mas: ing Machine B (mas: ing)196 198198 199200 200 201201 202205192 194195 198200 201203 204 206 207

Examgle 11 Two machines Aand B, are used to pack biscuits. A sample of 10 packets was taken from each machine and the mass of each packet; measured to the nearest gram, was noted. Find the standard Deviation of the masses ofthe packets taken in the sample from each machine Which machine, do you think, is more reliable? Explain your answer Machine A (mas: ing Machine B (mas: ing) 196 198 198 199 200 200 201 201 202 205 192 194 195 198 200 201 203 204 206 207

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