Based on the following regression equation of teenage BMI, which one is the estimated BMI for a teenage male (male: gender=0; female: gender=1) who watches 8 hours of TV per day, eats 6 meals per day, and whose mother's BMI is 17? BMI = 3.5 + 1.01 * Gender + 1.03 * TV/day + 1.02 * Meals/day + 0.9 * MotherBMI
Q: Find a linear regression model for the men's 100 meter freestyle data given in Table 7, where x is…
A: According to the given information it is required to form a linear regression model for the men’s…
Q: What is the expected weight of a chimpanzee that is 157 cm tall?
A: Here Given Regression Equation Y = 0.34x + 19.5 Where Y = Weight in Kg x = Height in cm And…
Q: Find the correlation between age and blood pressure using simple and Spearman's correlation…
A: Use EXCEL to obtain the value correlation coefficient r: EXCEL procedure: Go to EXCEL Go to…
Q: From the given data, calculate the regression equations taking deviation of items
A: From the given data , our aim is to find the regression equation. y=a+bx
Q: If the correlation of the X's is equal to 1 or -1, then the regression cannot process. Why?
A: Correlation of X's means that the independent variables (IVs) are dependent on each other and this…
Q: Define a general formula used for a nonlinear population regression function? Explain with example?
A:
Q: Define the ADL and GLS Estimators of Regression.
A:
Q: The following estimated regression model was developed relating yearly income (Y in $1,000s) of 30…
A:
Q: Write the regression equation that Breusch-Godfrey test use to find out if the errors are…
A: Given: Breusch-Godfrey test is used to find out if the errors are independent.
Q: A company advertises its product in different media. They have established a regression model to…
A: The regression method is the most usable concept for prediction. The multiple regression model can…
Q: 2. For a linear regression model including only an intercept, the OLS estimator of that intercept is…
A: We have given that For a linear regression model including only an intercept, the OLS estimator of…
Q: Assume a person got score of 32.5 on Test A and a score of 95.25 on Test B. Using the regression…
A:
Q: Which of the following is(are) TRUE about the simple linear regression model to describe the…
A: Here use relation of slope and correlation coefficient
Q: In a regression context, under what situation is the predicted value for Y equal to the mean of Y?
A: To find: under what situation is the predicted value for Y equal to the mean of Y Let us assume…
Q: what is the best-predicted weight for a bear with 43 inches, and What is the regression equation?
A: The variable x represents the chest size and y represents the weight.
Q: If two regression coefficients are bx and br 20 what would be the value of ry?
A: Given: given regression coefficients of y on x byx=5/6 and x on y bxy=9/20 then to find…
Q: Set up the regression equation and calculate the predicted satisfaction with major for someone with…
A:
Q: Find the equation of the regression line for the given data. Round values to the thousandth
A: Solution: Number of counts (n) = 10 x y xy x2 -5 11 -55 25 -3 6 -18 9 4 -6 -24 16…
Q: Find the equation of the regression line for the given data. What would be the predicted number of…
A:
Q: Find the equation of the regression line for the given data:
A: Linear regression model A linear regression model corresponds to a linear regression model that…
Q: A certain Instructor believes that the grades of students is related to the number of progress…
A:
Q: A biologist was interested in the relationship between the ve- locity at which a beluga whale swims…
A: We have to check what changes happen in correlation cofficient on changing unit of one variable.
Q: The level of significance is 0.05. In the regression model, which of the following are dummy…
A: # Dummy variable are the variable which. Categorise itself into different categories Example: type…
Q: 7. What is the regression equation that would be used to predict Y using X for this problem? 8.…
A:
Q: When is the coefficient of certainty obtained from the regression equation equal to the square of…
A: Regression equation gives the relation between the response variable and the explanatory…
Q: The following data resulted from a study commissioned by a large management consulting company to…
A:
Q: 4. Find the regression equation for predicting final score from midterm score, based on the…
A: For solution number 4 Given: y¯f=70sf=10x¯m=55sm=20r=0.60
Q: According to the regression equation, for a student who gets 85 on the midterm (one standard…
A: For midterm, it is given that Mean1 = 75, SD1 = 10 For final, it is given that Mean2 = 75, SD2 = 10…
Q: A biologist was interested in the relationship between the ve- locity at which a beluga whale swims…
A: Given: n = 19 Mean frequency X = 1.1334 Standard deviation Sx = 0.3534 Mean speed Y = 0.6558…
Q: For a simple linear regression model, if the coefficient of correlation is 0.75, what does the…
A:
Q: 1. Develop a simple linear regression equation for starting salaries using an independent variable…
A: The simple linear regression equation is given by y^=β0+β1x+∈i let X be a independent variables Let…
Q: Which of the following is the regression equation at the 1% meaning level according to the Minitab…
A: The coefficient that are significant at 0.01 level of significance is those coefficients with…
Q: The following estimated regression model was developed relating yearly income (y in $1000s) of 30…
A: given regression model, ŷ = 30 + 0.7x1 + 3x2 x1 represents the age x2 represenst the gender (0…
Q: Suppose you wanted to test whether or not the payoff to an additional year of education was the same…
A: We want to test whether the pay-off for an additional year of education was same for mean and women…
Q: isted below are systolic blood pressure measurements (in mm Hg) obtained from the same woman. Find…
A: Solution: Let x = Right Arm and y = Left Arm x y x2 xy 102 177 10404 18054 101 170 10201…
Q: In the method of regression, data sets are summarized in a useful form. The “independent” pieces of…
A: The solution of this question is given below:
Q: What is meant by the Regression equation?
A: A regression equation is a statistical model that show the relationship between the predictor…
Q: a. Fit the regression equation of No. of Job Offers on Years of Work Experience. b. What will be the…
A: Given : Data represents years of work experience and number of job offers of 10 job seekers . The…
Q: The U.S. Postal Service is attempting to reduce the number of complaints made by the public against…
A: Given: x is the hourly wage y is the number of complaints α=20.2β=-1.20
Q: A group of scientists are interested in finding out whether the days of rainfall during the dry…
A: We use regression analysis to predict a dependent variable using independent random variable.
Q: If the coefficient of determination of a simple regression equation is 0.81, the correlation…
A: Correlation coefficient is the square root of coefficient of determination.
Q: Are boys, on average, heavier than girls at birth, all other factors being equal? If so, by how…
A: The given regression model estimates the weight of new born babies on the basis of factors affecting…
Q: Using the regression line, we predict the final score of a student with a midterm score of 70 to be…
A:
Q: When should a regression model not be used to make a prediction?
A: Not using regression model to make prediction when: there are few point which should be like that
Q: Suppose a simple logistic regression is estimated to relate the condition of contacting the…
A: Given the equation of simple logistic regression is estimated to relate the condition of contacting…
Q: Suppose you wanted to test whether or not the payoff to an additional year of education was the same…
A: We want to test whether the pay-off for an additional year of education was same for mean and women…
Q: A biologist was interested in the relationship between the ve- locity at which a beluga whale swims…
A: The standard form of simple linear regression equation is y^=a+bx, where a is the intercept and b is…
Q: Suppose the equation for the regression line for the number of runs scored in a season, y, is given…
A: We have given that The equation of regression line for the number of runs scored in a season is, y…
Q: A regression was run to determine if there is a relationship between hours of study per week (x) and…
A: From the given information, y=ax+b a=5.78 b=30.04 Therefore, the regression equation is…
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- Olympic Pole Vault The graph in Figure 7 indicates that in recent years the winning Olympic men’s pole vault height has fallen below the value predicted by the regression line in Example 2. This might have occurred because when the pole vault was a new event there was much room for improvement in vaulters’ performances, whereas now even the best training can produce only incremental advances. Let’s see whether concentrating on more recent results gives a better predictor of future records. (a) Use the data in Table 2 (page 176) to complete the table of winning pole vault heights shown in the margin. (Note that we are using x=0 to correspond to the year 1972, where this restricted data set begins.) (b) Find the regression line for the data in part ‚(a). (c) Plot the data and the regression line on the same axes. Does the regression line seem to provide a good model for the data? (d) What does the regression line predict as the winning pole vault height for the 2012 Olympics? Compare this predicted value to the actual 2012 winning height of 5.97 m, as described on page 177. Has this new regression line provided a better prediction than the line in Example 2?What does the y -intercept on the graph of a logistic equation correspond to for a population modeled by that equation?The following fictitious table shows kryptonite price, in dollar per gram, t years after 2006. t= Years since 2006 0 1 2 3 4 5 6 7 8 9 10 K= Price 56 51 50 55 58 52 45 43 44 48 51 Make a quartic model of these data. Round the regression parameters to two decimal places.
- Table 6 shows the population, in thousands, of harbor seals in the Wadden Sea over the years 1997 to 2012. a. Let x represent time in years starting with x=0 for the year 1997. Let y represent the number of seals in thousands. Use logistic regression to fit a model to these data. b. Use the model to predict the seal population for the year 2020. c. To the nearest whole number, what is the limiting value of this model?QUESTION 2 XXX Electric Illuminating Company is doing a survey on the relationship between electricity used in kilowatt-hours (thousand) and the number of rooms in a private single-family residence. A random sample of 10 homes was selected and the electricity consumption recorded as below. ii. Find a suitable linear regression equation ? = ? + ??. iii. Determine the number of kilowatt-hours (thousand) for an eleven-room residence.Question 4: A company studied the productivity of their employees on a new information system. They were interested in if the age (X) of data entry operators influenced the number of completed entries made per hour (Y). If the regression equation is = 14.374 + 0.145x. The SD of age is = 14.04, and the SD of the number of completed entries made per hour is = 2.61. What is the correlation coefficient between age and productivity? How to interpret the correlation? How to interpret the slope? If a data entry operator is 40 years old, what is the predict productivity using the regression equation?
- Question 3. Calculate and interpret the regression line for the data.Question 4 The following table displays the mathematics test scores for a random sample of college students, along with their final SY16C grades. Fit the regression line y = a+bx to the data and interpret the results. Use the regression equation to determine the SY16C grade for a college student who scored 60 on their achievement test. What would their SY16C grade be? Mathematics test (x) SY16C grades (y) 1 39 65 2 43 78 3 21 52 4 64 82 5 57 92 6 47 89 7 28 73 8 75 98 9 34 56Question 16 Regression analysis was applied between sales (in $1000s) and advertising (in $100s), and the following regression function was obtained. = 500 + 4x Based on the above estimated regression line, if advertising is $10,000, then the point estimate for sales (in dollars) is _____. $505,000 $900 $40,500 $900,000
- Question 2 Personal wealth tends to increase with age as older individuals have had more opportunities to earn and invest than younger individuals. The following data were obtained from a random sample of eight individuals and records their total wealth (Y) and their current age (X). Person Total wealth (‘000s of dollars) Age (Years) Y X A 280 36 B 450 72 C 250 48 D 320 51 E 470 80 F 250 40 G 330 55 H 430 72 A part of the output of a regression analysis of Y against X using Excel is given below: SUMMARY OUTPUT Regression Statistics Multiple R 0.954704 R Square 0.91146 Adjusted R Square 0.896703 Standard Error 28.98954…Question 4 The following table shows information related to the number of salesman and sales made in October 2020 for Jubilee Berhad: Salesman Sales 1 200 2 260 3 700 4 840 5 1,000 6 1,100 Required: Forecast the total sales if the company has 10 salesman. Determine the correlation coefficient between the number of salesman and total sales if the company maintain the existing number of salesman. The sales trend can be described by the linear regression equation y = 780 + 4x, where x is the month number (with January 2013 as month 0) and y is sales in RM'000. The average seasonal variation for March is 106%. Forecast the sales for March 2015 (in thousand RM). Badrol anticipates that a 90% learning curve will apply to the production of a new item. The first item will cost RM2,500.00 in materials, and will take 500 labour hours. The cost per hour for labour and variable overhead is RM15.00. Calculate the total cost…Question #6 Listed below are altitudes (thousands of feet) and outside air temperatures (°F) recorded during a flight. Find the (a) explained variation, (b) unexplained variation, and (c) indicated prediction interval. There is sufficient evidence to support a claim of a linear correlation, so it is reasonable to use the regression equation when making predictions. For the prediction interval, use a 95% confidence level with the altitude of 6327 ft (or 6.327 thousand feet). Altitude 4 8 14 24 27 31 32 Temperature 55 37 20 −5 −27 −41 −57 a. Find the explained variation. ______________ (Round to two decimal places as needed.) b. Find the unexplained variation. _______________ (Round to five decimal places as needed.) c. Find the indicated prediction interval. _____________°F < y < ____________ °F (Round to four decimal places as needed.)