statistics

A random sample of n = 4 scores is selected from a population with ƒÝ = 80 and ƒã = 20. On average, how much difference would you expect between the sample mean and the population mean?
a. 0 points (the sample mean should be the same as the population mean)
b. 5 points
c. 10 points
d. 80 points

  1. 👍 0
  2. 👎 0
  3. 👁 250
  1. Plus or minus a standard error of the mean (SEm) encompasses approximately 68% of the probable scores.

    SEm = SD/√n

    1. 👍 0
    2. 👎 0

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