The following are historical data on staff salaries (dollars per pupil) for 30 schools sampled in the castern part of the United States in the early 1970s. 3.79 2.99 2.77 2.91 3.10 1.84 2.52 3.22 2.45 2.14 2.67 2.52 2.71 2.75 3.57 3.85 3.36 2.05 2.89 2.83 3.13 2.44 2.10 3.71 3.14 3.54 2.37 2.68 3.51 3.37 Do the following: a) Compute the sample mean and sample standard deviation. b) Compute for the skewness (Pearson's first coeff.) and the kurtosis of the data c) Construct a relative frequency histogram of the data. d) Construct a stem-and-leaf display of the data.

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The following are historical data on staff salaries (dollars per pupil) for 30 schools sampled in the castern part
of the United States in the early 1970s.
3.79 2.99 2.77 2.91 3.10 1.84 2.52 3.22
2.45 2.14 2.67 2.52 2.71 2.75 3.57 3.85
3.36 2.05 2.89 2.83 3.13 2.44 2.10 3.71
3.14 3.54 2.37 2.68 3.51 3.37
Do the following:
a) Compute the sample mean and sample standard deviation.
b) Compute for the skewness (Pearson's first coeff.) and the kurtosis of the data
c) Construct a relative frequency histogram of the data.
d) Construct a stem-and-leaf display of the data.
Transcribed Image Text:The following are historical data on staff salaries (dollars per pupil) for 30 schools sampled in the castern part of the United States in the early 1970s. 3.79 2.99 2.77 2.91 3.10 1.84 2.52 3.22 2.45 2.14 2.67 2.52 2.71 2.75 3.57 3.85 3.36 2.05 2.89 2.83 3.13 2.44 2.10 3.71 3.14 3.54 2.37 2.68 3.51 3.37 Do the following: a) Compute the sample mean and sample standard deviation. b) Compute for the skewness (Pearson's first coeff.) and the kurtosis of the data c) Construct a relative frequency histogram of the data. d) Construct a stem-and-leaf display of the data.
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