A local quilter's guild has a population of 80. When asked how many quilts each person makes in a year, the mean of the population was 4.2. Each person in a group of 8 researchers took a sample size of 10 and determined the mean number of quilts made in one year. What statement accurately describes the relationship between the sample mean and the population mean?
a. The sample mean has to be exactly the same as the population mean
b. The sample mean may or may not be equal to the population mean.
c. The sample mean is always less than the population mean.
d. The sample mean is never the same as the population mean.
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