Twelve students were comparing test scores in their statistics course. Their scores were as follows:

a. Calculate the mode of the scores.

b. Calculate the median of the scores.

c. Calculate the mean of the scores.

d. Calculate the 8.3% trimmed mean of the scores.

e. Compare your models of central tendency. Why does one model differ from the others? What does that mean when trying to ascertain the middle of the distribution?

f. Calculate the range of the scores.

g. Calculate the interquartile range of the scores.

h. Calculate the standard deviation of the scores. Assume that you want to use the data in this sample to estimate the population standard deviation.

i. Calculate the variance of the scores. Assume that you want to use the data in this sample to estimate the population variance.

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