Download Quiz #2 Stat 145

Quiz #2 ( Fawcett)
1.
Stat 145
Name______________________
Find the standard deviation for the following data, by hand: 23, 21, 30, 27, 33.
By hand means you must show all your work by making a table lists of data
elements, their differences from the mean and the squares of their differences
from the mean, as well as the final calculation from the formula.
2. a) Do the 5 number summary for the data: 7, 5, 8, 11, 7, 3, 9, 13, 1, 4. Please
show all of your calculations.
b) Illustrate the summary using a box and whisker plot. (best to place box plot
horizontally)
3.
Men between 18 and 25 years of age and who are 6 feet tall have weights that are
normally distributed with a mean of 175 pounds and a standard deviation of 6.5
pounds. Find
a) the proportion of these men who are greater than 190 pounds.
b) The proportion of these men who are between 160 and 170 pounds.