Question

the table to the right gives the cost of living index (coli) for six east coast counties and six midwest counties (using an index where 100 represents the average cost of living for all participating cities with a population of more than 1.5 million). answer parts (a) through (e) below.

east coast counties		midwest counties
b	128.9	v	92.2
c	314.8	w	94.9
d	134.8	x	87.6
e	123.2	y	95.5
f	141.2	z	228.5

a. find the mean, median, and range for each of the two data sets.
the mean for the east coast counties is \\(\square\\).
(type an integer or decimal rounded to two decimal places as needed.)

Explanation:

Step1: Identify East Coast data

East Coast Counties data: 104.5, 128.9, 314.8, 134.8, 123.2, 141.2.

Step2: Calculate sum of data

Sum = \( 104.5 + 128.9 + 314.8 + 134.8 + 123.2 + 141.2 \)
\( = 104.5 + 128.9 = 233.4 \); \( 233.4 + 314.8 = 548.2 \); \( 548.2 + 134.8 = 683 \); \( 683 + 123.2 = 806.2 \); \( 806.2 + 141.2 = 947.4 \)

Step3: Calculate mean (sum / number of data points)

Number of data points = 6. Mean = \( \frac{947.4}{6} = 157.90 \)

Answer:

157.90