Question

8) The temperature id degrees Fahrenheit and the number of emergency calls are shown below. Determine if there is a relationship between the temperature and the number of emergency calls received. Use .05 significance.

number of calls (y) Temperature (x)

7 - 68

4 - 74

8 - 82

10 - 88

11 - 93

9 - 99

13 - 101

What is the linear equation?

A. y=7.5441 + 0.1898x

B y= 7.5441 - 0.1898x

C y= 7.5441 + 0.1898x

D y= -7.5441-0.1898x

Answer 1

X	Y	XY	X^2	Y^2
68	7	476	4624	49
74	4	296	5476	16
82	8	656	6724	64
88	10	880	7744	100
93	11	1023	8649	121
99	9	891	9801	81
101	13	1313	10201	169

From the above table and formula we get the value are as:

n	7
sum(XY)	5535.00
sum(X)	605.00
sum(Y)	62.00
sum(X^2)	53219.00
sum(Y^2)	600.00

b	0.1898
a	-7.5441

ycap= a+ bx

ycap = -7.5441 + 0.1898x