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. A group of 40 children attending two classes in a regional school was randomly selected to calculate their body mass index. The mean weight

. A group of 40 children attending two classes in a regional school was randomly selected to calculate their body mass index. The mean weight of the children was 25.5 kilograms, with a population standard deviation of 3.1 kilograms. Based on these figures, calculate the following (show your calculations):

  • The 99% confidence interval for weight of this sample of children
  • The 95% confidence interval for weight of this sample of children

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