Answered: my To help consumers in purchasing a…

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.5: Interpreting Data

Problem 9E

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Question

!
60-
55-
600
800
1000
1200
1400
Price ($)
Graph C
b. What does the scatter diagram developed in part (a) indicate about the relationship between the two variables?
The scatter diagram indicates a positive
linear relationship between the two variables.
c. Use the least squares method to develop the estimated regression equation (to 4 decimals),
y =
ŷ
X
+
I
d. Provide an interpretation of the slope of the estimated regression equation (to the nearest whole number).
The slope means that spending an additional $100 in price will increase
S
the overall score by approximately
points.
e. Another laptop that Consumer Reports tested is the Acer Aspire S3-951-6646 Ultrabook; the price for this laptop was $700. Predict the overall score for this laptop using the estimated
regression equation developed in part (c) (to 1 decimal).
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Hint(s) Check My Work
Icon Key
()
DII
000
000
F7
F8
F6
F4
F1
@
F2
#
80
F3
$
%
F5
^
&
F9
)
J
F10
F11
+
F12

Transcribed Image Text:Hint(s) Check My Work To help consumers in purchasing a laptop computer, Consumer Reports calculates an overall test score for each computer tested based upon rating factors such as ergonomics, portability, performance, display, and battery life. Higher overall scores indicate better test results. The following data show the average retail price and the overall score for ten 13-inch models (Consumer Reports website). Click on the datafile logo to reference the data. O DATA file Price Overall Score Brand & Model ($) 83 N Samsung Ultrabook NP900X3C-A01US Apple MacBook Air MC965LL/A Apple MacBook Air MD231LL/A HP ENVY 13-2050nr Spectre XT Sony VAIO SVS13112FXB Acer Aspire S5-391-9880 Ultrabook. Apple MacBook Pro MD101LL/A Apple MacBook Pro MD313LL/A Dell Inspiron 113Z-6591SLV Samsung NP535U3C-A01US esc ~ ! 1 a. Select the correct scatter diagram with price as the independent variable. A. Overall Score 000 000 F6 F5 F4 F1 85- 80+ 75+ @ 2 F2 IA W # 3 20 F3 C $ 4 R % 5 T A 6 Y & 7 F7 U * 00 8 1250 1300 1200 950 800 1200 1200 1000 700 600 DII F8 1 ( 9 83 82 79 77 74 74 73 67 63 DD F9 O ) 0 78 F10 P a F11 { + 11 [ = F12 } 1 C A delete 1

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