Hwk Section 4.1 STAT 17o x Nw, Brase, understanding Basic st c Compute The sampl

Question

Hwk Section 4.1 STAT 17o x Nw, Brase, understanding Basic st c Compute The sample correlat x C www.webassign.net/web/student/Assignment-Responses 15326358 Do larger universties tend to have more property crime? university orime statsties are affected by a varety of factors. The surrounding community, accessibility given to outside vistors, and many other factors influence crime rate. Let xbe variable that represents student enrolment on a university campus, and let y be a variable that represents the number of in year on the university campus. A random sample of n 8 unversites in California gave the following information about enrollments and annual burglary inddents. (a) Make a scatter dagram of the data 1, Select object from the Tools menu to the left. 2 Enter ooordinates in Object Properties below, or use the mouse to place and move To enter a fractional or decimal coordinate, use object Properties H view Then visualize the line you think best its the data and y sa196 to verify that zr 151 B, zr 46, ry 243, Iy (b) Use a calculator comouter (Round to 3 deomal places. As x increases, does the value of r imply that y should tend to increase or decrease? Explain your answer

Explanation / Answer

here SSX=(3285.46)-(151.8)2/8=405.055

and SSY=9601-(243)2/8=2219.875

and Sxy=5319.6-(151.8*243)/8=708.675

hence r=Sxy/(SSx*SSy)1/2=0.747

given our value of r, y should tend to increase

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