A regression analysis between sales (in $1000) and price (in dollars) gives the following equation:ý = 40, 000 – 5xWhich of the following is a correct interpretation?O a. An increase of $1 in price is associated with a decrease of $5 in salesO b. An increase of $1 in price is associated with a decrease of $35, 000 in salesO C. An increase of $5 in price is associated with a increase of $5, 000 in salesO d. An increase of $1 in price is associated with a decrease of $5, 000 in sales If r = 0.6, the percentage of variation in y explained by x is 60%.Select one:O TrueO False

We have given that The regression equation is, y^ = 40000 - 5x and r = 0.6

Answered: A regression analysis between sales (in…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The monthly water consumption (thousand liters) and the number of household members in eight private single-family residences is given in the following table: No. of members 12 14 6. 10 8 10 10 Water use (thousand liters) 7 10 5 8 8 10 a. Determine the slope coefficient B1 for the regression of water use given No. of household members. Answer rounded to three decimal places. b. Determine the y-intercept Bo for the regression of water use given No. of household members. Answer rounded to two decimal places. c. Determine the water use for a five-member household. Answer rounded to two decimal places. thousand liters
13. LANDSCAPE George hired some people to work on his yard one day per week for a month. At the end of the month George received a bill. On the bill he was charged $230 for 12 hours worth of work, including a monthly service fee of $50. a. Assuming that the relationship between the amount of the bill and the number of hours worked is linear, write an equation for this relationship. b. What is the slope of the line? What are the units associated with the slope of the line? What does the slope tell you about the problem situation? C. What is the vertical intercept of the line? What does the vertical intercept tell you about the problem situation?
3. The percent y of high school seniors who smoke cigarettes can be described by y = 85.79 – 2.39x where x is the number of years past 1975 (Source: National Institute on Drug Abuse) (a) Find the slope and y-intercept of this equation. (b) Write a sentence that interprets the meaning of the slope as a rate of change. (c) Write a sentence that interprets the meaning of the y-intercept.
A hotel is monitoring how the number of increases in price affects the weekly profit. The table models the weekly profit, y, after a given number of price increases, x. Which type of models would best fit the data?
I don't understand.
in regression analysis in population is associated with a decrease in crime rate the relationship has SSR of 250 and SST of 440. That percent of the crime rate is determined by the size of population? a. 76% b. 24.89% c. 56.82& d. 75.38% e. 43.18%
Use the Women's Earnings scatterplot below to answer the questions. Women's Earnings as a Percentage of Men's Earnings 90 80 70 60 50 y = 0.617x - 1156.3 40 R² = 0.9302 à 30 20 10 1979 1984 1989 1994 1999 2004 2009 Year What is the independent variable and what does it represent? Year Percentage Income in dollars CO2 Percentage
A regression analysis between sales ( Y in $1,000 ) and advertising (X in $1,000) resulted in the following equation = 14,200 + 2.6 X The above equation implies that … … an increase of $ 14,200 in advertising is associated with an increase of $ 14,200 in sales … an increase of $ 1,000 in advertising is associated with an increase of $ 14,200 in sales … an increase of $ 2,600 in advertising is associated with an increase of $ 1,000 in sales … an increase of $ 1,000 in advertising is associated with an increase of $ 2,600 in sales
A grocery store is interested in how customers' income affects the amount of money they spend each week. A regression analysis is performed to test this analysis. The results of the analysis are that the intercept is $17.80 and the slope is 0.0012. Based on these results, what is the predicted weekly grocery expenditure (to the nearest cent) for a household with an income of $65,000? $95.80 O$78.00 $45.23 $17.80 Ho: mean weekly expenditure = $78.00
You have found that the effect of IQ on test score can be modelled as a straight line with an intercept of -3.56 and a slope of 0.1. For an IQ of 100 (x) what would be the predicted test score (y)? A. 6.44 B. 3.56 C. 356.1 D. 100
For the data in the table, find the regression equation. Here, x gives the number of years of experience for nurses, and y is their annual salary (in $1000's). Round the slope and y-intercept to two decimals, then use your equation to answer the questions below. Years of Salary Experience ($1000's) 40 4 42 43 45 10 46 13 52 15 53 17 56 21 58 22 60 a. What is the expected salary (in $1000's) for a nurse with no work experience? b. By what amount (in $1000's) does an extra year of experience boost the annual salary?
You have found that the effect of IQ on test score can be modelled as a straight line with an intercept of -3.56 and a slope of 0.1. For an IQ of 100 (x) what would be the predicted test score (y)? A. 6.44 B. 3.56 C. 356.1 D. 100

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