Question

How Democratic is Georgia? County-by-county results are shown for a recent election. For your convenience, the data have been sorted in increasing order (Source: County and City Data Book, 12th edition, U.S. Census Bureau).

Percentage of Democratic Vote by Counties in Georgia

31	33	34	34	35	35	35	36	38	38	38	39	40	40	40
40	41	41	41	41	41	41	41	42	42	43	44	44	44	45
45	46	46	46	46	47	48	49	49	49	49	50	51	52	52
53	53	53	53	53	55	56	56	57	57	59	62	66	66	68

(a) Select the box-and-whisker plot of the data.

(b) Find the interquartile range.


(c) Make a frequency table using five classes.

class	31-38	39-46	47-54	55-62	63-70
f

Then estimate the mean and sample standard deviation using the frequency table. (Round x to one decimal place, and round s to two decimal places.)

x
s

Compute a 75% Chebyshev interval centered about the mean. (Round your answers to two decimal places.)

Lower limit
Upper limit

(d) If you have a statistical calculator or computer, use it to find the actual sample mean and sample standard deviation. Otherwise, use the values Σx = 2769 and Σx² = 132,179 to compute the sample mean and sample standard deviation. (Round your answers to two decimal places.)

x
s

Answer 1

answered by: anonymous