(Solution) An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y... > Snapessays.com


(Solution) An economist is studying the job market in Denver area neighborhoods. Let x represent the total number of jobs in a given neighborhood, and let y...


An economist is studying the job market in Denver area neighborhoods. Letxrepresent the total number of jobs in a given neighborhood, and letyrepresent the number of entry-level jobs in the same neighborhood. See AttachmentAn economist is studying the job market in Denver area neighborhoods. Let

 

x

 

represent the total number

 

of jobs in a given neighborhood, and let

 

y

 

represent the number of entry-level jobs in the same

 

neighborhood. A sample of six Denver neighborhoods gave the following informaTon (units in hundreds

 

of jobs).

 

x

 

13

 

35

 

52

 

28

 

50

 

25

 

y

 

2

 

4

 

7

 

5

 

9

 

3

 

Complete parts (a) through (e), given ?

 

x

 

= 203, ?

 

y

 

= 30, ?

 

x

 

2

 

= 8007, ?

 

y

 

2

 

= 184, ?

 

xy

 

= 1195, and

 

r

 

? 0.915.

 

(a) Draw a sca±er diagram displaying the data.

 

(b) Verify the given sums ?

 

x

 

, ?

 

y

 

, ?

 

x

 

2

 

, ?

 

y

 

2

 

, ?

 

xy

 

, and the value of the sample correlaTon coeFcient

 

r

 

. (Round

 

your value for

 

r

 

to three decimal places.)

 

?

 

x

 

=

 

?

 

y

 

=

 

?

 

x

 

2

 

=

 

?

 

y

 

2

 

=

 

?

 

xy

 

=

 

r

 

=

 

(c) ²ind

 

x

 

, and

 

y

 

. ³hen ´nd the equaTon of the least-squares line

 

=

 

a

 

+

 

bx

 

. (Round your answers

 

for

 

x

 

and

 

y

 

to two decimal places. Round your answers for

 

a

 

and

 

b

 

to three decimal places.)

 

x

 

=

 


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DATE ANSWERED

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