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  1. J

    Percentage of data points in distribution

    Hello, I have a sample of data for which I have figured out that the population mean for the height of US 12-year-old children is μ = 150 cm with σ = 6 cm. The heights are normally distributed. I now need to figure out the percentage of children have heights between 141 and 159 cm. Any help is...
  2. J

    Standard Deviation not Equal to Standard Error

    Question: If the standard deviation of a particular sample with size N is not equal to the standard error for samples of the same size. Can you tell which is larger? If so, why? Choices: A. Yes. The standard deviation gets smaller with increasing sample size, so it must be smaller...