**Unformatted text preview: **A-L Ads (X) Customer(Y)
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367 This Is an Independent Assignmen For Those Whose Last Name Starts w The manager of Colonial Furniture has been reviewing weekly
advertising expenditures. During the past 6 months, all
advertisements for the store have appeared in the local
newspaper. The number of ads per week has varied from one t
seven. The store's sales staff has been tracking the number of
customers who enter the store each week. The number of ads
and the number of customers per week for the past 26 weeks
were recorded.
a). Determine the sample regression line. ( 3 marks) b). Find and interpret the coefficient of determination. (2 marks) c). Find and interpret the y-intercept. (2 marks) d). Find and interpret the slope of the regresion line. (2 marks) Page 1 A-L e). Predict the number of customers enter the store if the manager
decides to put up 12 ads in the future. (1 mark) Page 2 A-L ent Assignment Name Starts with A to L een reviewing weekly
t 6 months, all
red in the local
has varied from one to
acking the number of
k. The number of ads
or the past 26 weeks marks) mination. (2 marks) ) on line. (2 marks) Page 3 A-L store if the manager
k) Page 4 Work Experience
(X) Salary Received
(Y) 15
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$66 This Is an Independent Assig For Those Whose Last Name Sta The HR department in a company is preparing fo
performance evaluation event. The manager of H
some information about employees' number of y
and the salary they are currently receiving. a). Determine the sample regression line. (3 marks) b). Find and interpret the coefficient of determination. c). Find and interpret the y-intercept. (2 marks) d). Find and interpret the slope of the regresion line. (2 e). Predict the amount of bonus received if a worker ha
work experience. (1 mark) e). Predict the amount of bonus received if a worker ha
work experience. (1 mark) pendent Assignment Last Name Starts with M to R mpany is preparing for its
nt. The manager of HR has gathered
ployees' number of years of service
ently receiving. ssion line. (3 marks) cient of determination. (2 marks) rcept. (2 marks) of the regresion line. (2 marks) s received if a worker has 25 years of s received if a worker has 25 years of Floor (X) Price (Y)
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235 This Is an Independent Assignment For Those Whose Last Name Starts with S Florida condominiums are popular winter retreats for many Nor
Americans. In recent years, the prices have steadily increased. A
estate agent wanted to know why prices of similar-sized apartm
the same building vary. A possible answer lies in the floor. It may
the higher the floor, the greater the sale price of the apartment
recorded the price (in $1,000s) of 1,200 sq. ft. condominiums in
buildings in the same location that have sold recently and the flo
number of the condominium. a). Determine the sample regression line. (3 marks)
Slope b1 = sxy/s^2x = 86.93/59.32 = 1.465
y-intercept b0
= y-bar - b1*x-bar
= 210.42 - 1.465*13.68
= 190.38 (rounded to two decimals)
Thus, Regression line will be y = 190.38 + 1.465x b). Find and interpret the coefficient of determination. (2 marks)
Coefficient of determination,
R2 = S2xy / S2x S2y
= (86.93)2
(56.32)(496.41)
=
7556.825
29447.04
=0.2566 c). Find and interpret the y-intercept. (2 marks) d). Find and interpret the slope of the regresion line. (2 marks) e). Predict the sale price for the condominium unit with a floor number
of 30. (1 mark) e). Predict the sale price for the condominium unit with a floor number
of 30. (1 mark) ssignment e Starts with S to Y etreats for many North
steadily increased. A real
similar-sized apartments in
ies in the floor. It may be that
ice of the apartment. He
ft. condominiums in several
ld recently and the floor rks) nation. (2 marks) line. (2 marks) nit with a floor number nit with a floor number ...

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