The following scores represent the final examination grades for an elementary statistics course: 23 60 79 32 57 74 52 70 82 36 80 77 81 95 41 65 92 85 55 76 52 10 64 75 78 25 80 98 81 67 41 71 83 54...

The following scores represent the final examination grades for an elementary statistics course:

a) Make a stem-and-leaf display for these data. Show at least five stems. Sort the data on each stem in order of increasing magnitude.

b) Find the median, lower quartile, and upper quartile of these data.

c) What fraction of the class received scores which were less than 65?

d) Make a frequency table, starting the first class interval at a lower class boundary of 9.5. Use Sturges’ Rule.

e) Draw a frequency histogram.

f) Draw a relative frequency histogram on the same x-axis.

g) Draw a cumulative frequency diagram.

h) Find the mode.

i) Show a box plot of these data.