MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
Bartleby Related Questions Icon

Related questions

bartleby

Concept explainers

Question

Managers of an outdoor coffee stand in Coast City are examing the relationship between (hot) coffee sales and daily temperature, hoping to be able to predict a day's total coffee sales from the maximum temperature that day. The bivariate data values for the coffee sales (denoted by y, in dollars) and the maximum temperature (denoted by x, in degrees Fahrenheit) for each of fifteen randomly selected days during the past year are given below. These data are plotted in the scatter plot in Figure 1. Also given are the products of the temperature values and coffee sales values for each of the fifteen days. (These products, written in the column labelled "xy," may aid in calculations.)

 

Temperature, x Coffee sales, y
(in degrees
Fahrenheit)
ху
(in dollars)
56.1
1597.8
89636.58
38.6
1989.4
76790.84
2400+
44.6
2019.2
90056.32
2200+
47.5
2111.7
100305.75
44.8
1813.7
81253.76
2000+
39.7
2266.1
89964.17
1800+
71.6
1968.7
140958.92
75.8
1503.0
113927.4
1600+
83.0
1524.9
126566.7
1400-
51.0
2218.5
113143.5
58.6
1961.5
114943.9
1200
75.6
1684.1
127317.96
40
60
70
80
90
76.9
1970.1
151500.69
63.5
1810.6
114973.1
Figure 1
68.0
1733.3
117864.4
Send data to calculator
Send data to Excel
Answer the following. Carry your intermediate computations to at least four decimal places, and round your answer as specified below.
What is the value of the slope of the least-squares
regression line for these data? Round your answer to at|
least two decimal places.
expand button
Transcribed Image Text:Temperature, x Coffee sales, y (in degrees Fahrenheit) ху (in dollars) 56.1 1597.8 89636.58 38.6 1989.4 76790.84 2400+ 44.6 2019.2 90056.32 2200+ 47.5 2111.7 100305.75 44.8 1813.7 81253.76 2000+ 39.7 2266.1 89964.17 1800+ 71.6 1968.7 140958.92 75.8 1503.0 113927.4 1600+ 83.0 1524.9 126566.7 1400- 51.0 2218.5 113143.5 58.6 1961.5 114943.9 1200 75.6 1684.1 127317.96 40 60 70 80 90 76.9 1970.1 151500.69 63.5 1810.6 114973.1 Figure 1 68.0 1733.3 117864.4 Send data to calculator Send data to Excel Answer the following. Carry your intermediate computations to at least four decimal places, and round your answer as specified below. What is the value of the slope of the least-squares regression line for these data? Round your answer to at| least two decimal places.
Expert Solution
Check Mark
Knowledge Booster
Background pattern image
Statistics
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.
Similar questions
Recommended textbooks for you
Text book image
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Text book image
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Text book image
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Text book image
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
Text book image
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Text book image
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman