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New cholesterol medication for male teenagers

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Doctors are researching a new cholesterol medication for male teenagers. Eighteen (18) randomly selected male teenagers have taken the new medication for six weeks. The doctors want to create 95% confidence interval to estimate the true mean cholesterol level of male teenagers that take the new medication. Their data follow a normal distribution and the population standard deviation is σ=30

Have the requirements for the confidence interval been satisfied? Why or why not?

  • Yes. The distribution of sample means is normal because the data are normal.
  • Yes. The distribution of sample means is normal because the sample size is large.
  • No. The distribution of sample means is not normal because the sample size is small.
  • No. The distribution of sample means is not given to be normal.

Reference no: EM132201052

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