# 12.3 fitting a straight line to a set of data yields the following

12.3 Fitting a nearest row to a set of grounds yields the aftercited prophecy row:
a. Understand the purport of the Y catch,
b. Understand the purport of the grow,
c. Prognosticate the appraise of Y for X =6
12.7 Starbucks Coffee Co. uses a grounds-established appropinquation to decorous the kind and customer pleasure of its products. When scan grounds involved that Starbucks needed to ameliorate its package sealing order, an trial was conducted (grounds extracted from L. Johnson and S. Burrows, “For Starbucks, It’s In the Bag,” Kind Progress, March 2011, pp. 17–23) to enumerate the contents in the bag-sealing equipment that dominion be solemn the contentment of inauguration the bag extraneously laceration the vital rowr of the bag. One content that could interest the rating of the ability of the bag to oppose whine was the mess gap on the bagsealing equipment. Grounds was cool on 19 bags in which the mess gap was multifarious. The results are stored in Starbucks .
a. Construct a disseminate concoct.
b. Assuming a rowar homogeneity, use the least-squares way to enumerate the return coefficients b0 and b1
c. Understand the purport of the grow, b1, in this total.
d. Prognosticate the rend rating when the mess gap is resembling to 0.
Tear Viscosity Pressure Mess Gap
0.00 350.00 180.00 0.00
0.00 350.00 170.00 0.00
0.45 319.00 186.00 1.80
0.85 380.00 174.00 1.80
0.35 350.00 180.00 0.00
0.30 300.00 180.00 0.00
0.70 400.00 180.00 0.00
1.90 350.00 190.00 0.00
0.25 350.00 180.00 0.00
0.10 319.00 186.00 -1.80
0.15 380.00 186.00 -1.80
3.90 350.00 180.00 3.00
0.00 380.00 174.00 -1.80
0.55 350.00 180.00 0.00
0.00 350.00 180.00 -3.00
0.05 319.00 174.00 -1.80
0.40 319.00 174.00 1.80
4.30 380.00 186.00 1.80
0.00 350.00 180.00 0.00

12.9 An vicegefissure for a residential actual lands concourse has the affair external of developing past complimentary regards of the monthly fissureal absorb for chambers. Toward that design, the vicegefissure would approve to use the dimension of an chamber, as defined by balance footage to prognosticate the monthly fissureal absorb. The vicegefissure selects a exemplification of 25 chambers in a detail residential vicinity and collects the aftercited grounds (stored in RENT).
Rent Size
950 850
1600 1450
1200 1085
1500 1232
950 718
1700 1485
1650 1136
935 726
875 700
1150 956
1400 1100
1650 1285
2300 1985
1800 1369
1400 1175
1450 1225
1100 1245
1700 1259
1200 1150
1150 896
1600 1361
1650 1040
1200 755 (###) ###-####
1750 1200
12.19 In Total 12.7 on page 441, you used the mess gap on the bag-sealing equipment to prognosticate the rend rating of a bag of coffee (stored in ). Using the results of that total,
a. enumerate the coefficient of preference, and understand its purport.
b. enumerate the banner mistake of the regard.
c. How adapted do you hold this return rule is for prognosticateing the rend rating established on the mess gap in the bag-sealing equipment?
12.21 In Total 12.9 on page 442, an vicegefissure for a actual lands concourse wanted to prognosticate the monthly fissure for chambers, established on the dimension of the chamber (stored in ).
Using the results of that total,
a. enumerate the coefficient of preference, and understand its purport.
b. enumerate the banner mistake of the regard.
c. How adapted do you hold this return rule is for prognosticateing the monthly fissure?
d. Can you hold of other variables that dominion illustrate the exception in monthly fissure?