Draw a picture illustrating each of the following distributions, showing the t-values marking the specified areas and the proportion of the t-distribution that falls in that area.
Note: The use of either statistical software or Excel is necessary.
a. t-distribution with df = 10, middle 95%.
b. t-distribution with df = 20, area above 1.725.
c. t-distribution with df = 20, area between -1.725 and 1.725.
d. t-distribution with df = 10, upper 5%.
e. t-distribution with df = 10, area below -t and above +t (same t) totals 5%.