Thursday

May 28, 2015

May 28, 2015

Number of results: 9,584

**statistics**

A survey was taken in various Statistics classes and the following regression equation was obtained regarding the height and weight of students in the Statistics classes. Regression equation Height = 56.8 + 0.0712 Weight Given the regression equation above, what is the correct...
*April 9, 2014 by Mea*

**Statistics**

A set of X and Y scores has SSx=10, SSY=20, and SP=8, what is the slope for the regression equation? a. 8/10 b. 8/20 c. 10/8 d. 20/8 For the regression equation, Y=bX+a, which of the following X,Y points will be on the regression line? a. a,b b. b,a c. 0, a d. 0, b
*October 22, 2012 by Robbie*

**Statistics**

Determine the regression line of x+2y-5=0 and 3x+3y-8=0 (i) y on x and (ii) x on y, (iii) Find r using the regression coefficients
*September 26, 2011 by Deepti*

**Statistics**

For the regression equation, Y=bX+a, which of the following X,Y points will be on the regression line? a, a,b b, b,a c, 0,a d, 0,b
*October 26, 2012 by Robbie*

**Statistics**

Is is possible for the regression equation to have none of the actual (observed) data points located on the regression line?
*December 2, 2012 by Julia*

**statistics**

For a given set of data, it is known that x = 10 and y = 4. The gradient of the regression line y on x is 0.6. Find the equation of the regression line and use it to estimate y when x = 8.
*April 24, 2015 by ednah*

**Statistics**

Hi Can anyone tell me in a regression model are the values of 0.13 0.10 A good indication of of the total y explained in a regression model ?? Thanks.
*June 4, 2009 by Gary*

**statistics**

For the multiple regression equation ŷ = 100 + 20x©û - 3x©ü + 120x©ý a. Identify the y-intercept and partial regression coefficient. b. If x©û = 12, x©ü = 5, and x©ý c. If x©ý were to increase by 4, what change would be necessary in x©ü in order for the estimated value of...
*August 16, 2009 by Yadira M*

**college statistics**

construct a scatterplot for x,y values x 1 2 3 4 5 y 0.5 0.0 -0.5-1.0-1.5 what would be the slope of this regression line would the correlation between xand y be postive oe negative how would you interpret these data in terms of regression
*May 26, 2012 by melba*

**Statistics**

The following linear equation, y = b0 + b1x, is a regression line with y-intercept b0 and slope b1. Define These Terms 1) correlation coefficient 2) Linear regression equation
*May 19, 2011 by Leslie*

**college statistics**

if the correlation co-efficient is o.32 what is the sign of the slope regression line as the correlation co efficient decreases from 0.78 to 0.71 do the oints of the scatter plot move toward the regression line or away from it
*May 26, 2012 by melba*

**statistics**

If the correlation coefficient is -0.54, what is the sign of the slope of the regression line? - As the correlation coefficient decreases from 0.86 to 0.81, do the points of the scatter plot move toward the regression line, or away from it
*October 4, 2012 by mom*

**STATISTICS**

A) If a regression experiment has correlation coefficient r= 0.75, what precent of total variation is explained by the regression? B) if 85% of total variation is explained by the regression, and there is an inverse relationship between y and x, then what is the correlation ...
*April 17, 2011 by SROBSON*

**statistics**

3. You obtain the following regression statistics for the relationship between defect rate and volume at one of your plants. You have a random sample of results from 160 shifts at the plant.
*January 1, 2011 by john*

**Statistics**

I neep help on two questions! A condition that occurs in multiple regression analysis if the independent variables are themselves correlated is known as: 1. autocorrelation 2. stepwise regression 3. multicorrelation 4. multicollinearity (I think this is the answer) Multiple ...
*September 14, 2008 by Debra*

**Statistics**

The ages (in years) of 10 infants and the number of hours each slept in a day Age, x: 0.1, 0.2, 0.4, 0.7, 0.6, 0.9, 0.1, 0.2, 0.4, 0.9 Hours slept, y: 14.9, 14.5, 13.9, 14.1, 13.9, 13.7, 14.3, 13.9, 14.0, 14.1 Find the equation of the regression line. Then use the regression ...
*April 4, 2012 by Amanda*

**statistics**

In the following regression, X = total assets ($ billions), Y = total revenue ($ billions), and n = 64 large banks. (a) Write the fitted regression equation. (b) State the degrees of freedom for a twotailed test for zero slope, and use Appendix D to find the critical value at...
*March 15, 2012 by ronald*

**Statistics**

A regression equation was calculated and is given below. The values for Miss America are values such as 0, 1, 2, 3, 4, etc. Regression Analysis: GPA versus Miss America The regression equation is GPA = 3.32 - 0.0890 Miss America b. What is the response variable? The values of ...
*July 26, 2012 by Sheri*

**statistics**

The ages (in years) of 10 infants and the number of hours each slept in a day Age, x: 0.1, 0.2, 0.4, 0.7, 0.6, 0.9, 0.1, 0.2, 0.4, 0.9 Hours slept, y: 14.9, 14.5, 13.9, 14.1, 13.9, 13.7, 14.3, 13.9, 14.0, 14.1 Find the equation of the regression line. Then use the regression ...
*April 18, 2012 by Amanda*

**math**

Data were recorded for the demand and revenue of a given product. Find the linear regression line which represents the revenue function. Find the quadratic regression curve which represents the revenue function. Data Demand x Revenue y 1 0 100 2 4 139.2 3 8 176.8 4 12 212.8 5 ...
*October 15, 2014 by Jake*

**Statistics**

We're doing a project. I have all my data, but I'm not sure about what this is asking for. Use your regression equation to determine the purchase price for the 1999 Jeep Grand Cherokee. How does the predicted value, ŷ, compare to the average selling price, y, of your data...
*November 1, 2014 by AnaGloria1020*

**Statistics**

what is a least squares regression line?
*October 28, 2007 by Anonymous*

**statistics**

How do you calculate the slope and intercept of a regression?
*May 22, 2012 by Grant*

**statistics**

Linear Regression In the babies.dta full dataset, generate a covariate called painind defined as 1 if the infant experienced severe pain upon receiving the shot (pain0 = 7) and as 0 otherwise. In Stata, you can use the commands: generate painind = 0 replace painind = 1 if ...
*January 14, 2013 by Anonymous*

**Statistics**

Using a sample of recent university graduates, you estimate a simple linear regression using initial annual salary as the dependent variable and the graduate's weighted average mark (WAM) as the explanatory variable. If the regression model has an estimated intercept of 2200 ...
*May 25, 2012 by Anthony*

**Statistics**

What is the defintion of Logistic Multiple Regression Analysis?
*July 22, 2008 by John*

**Statistics**

Find the regression line for this data set. x y 0 23 2 27 2.3 29 4.1 32 5 35
*May 20, 2011 by Phillip*

**Statistics**

Using the following Minitab output write the straight line (least squares) equation and the correlation coefficient. The regression equation is Sales = 27.2 + 0.252 Exp Predictor Coef SE Coef T P Constant 27.195 5.781 4.70 0.005 Exp 0.2517 0.4201 0.60 0.575 S = 8.97833 R-Sq = ...
*March 6, 2013 by BettieLee*

**Business Statistics**

Instructions: Prepare your answers using Excel and show your work to get full or partial credit. Question 1: Using the file Wages.xlsx which contains information of working individuals, for a nationwide firm (Value 7 points). a) Run Descriptive Statistics for the variables ...
*December 14, 2011 by Katie*

**Statistics**

Simple regression Set up a general model and what assumptions are there?
*April 25, 2011 by Pipi*

**statistics**

eight pairs of data yield the regression equation y^1=55.8+2.79x. What is the value of y for x=5.6?
*November 27, 2011 by destiny*

**Statistics**

A set of X and Y scores has SSx=10, SSY=20, and SP=8, what is the slope for the regression equation? a, 8/10 b, 8/20 c, 10/8 d, 20/8
*October 26, 2012 by Robbie*

**statistics**

The following linear equation ,y= b0 = b1x, is a regression line with y-intercept b0 and slope b1.
*May 19, 2011 by jessica*

**statistics**

A set of X and Y scores has Mx=4, SSx=10, MY=5, SSY=40, and SP=40. What is the regression equation for predicting Y from X? a, =0.25X-4 b, =4X+4 c, =X-6 d, =4X-11
*October 26, 2012 by Robbie*

**correlation and regression**

the data given below has y = 3x-5 for its regression equation. find the standard error of estimate
*December 4, 2012 by reta*

**statistics**

An expert witness in a case of alleged racial discrimination in a state university school of nursing introduced a regression of the determinants of Salary of each professor for each year during an 8-year period (n = 423) with the following results, with dependent variable Year...
*March 19, 2012 by ronald*

**STATISTICS**

TRUE OR FALSE? Simple regression cannot be applied when r of two variables is very low.
*September 13, 2013 by Marian*

**Math: Statistics**

1. A regression analysis includes the effect of Age, which is categorised into five levels. How many dummy variables should be defined for including it in the analysis? 2. A regression analysis includes Sex as an explanatory variable. How many dummy variables are required to ...
*October 28, 2014 by Penny*

**statistics**

The data set healthy breakfast contains the ratings of 77 cereals and the number of grams of sugar contained in each searving. A simple linear regression model considering Sugar as the explanatory variable and Rating as the response variable produced the following regression ...
*September 13, 2012 by Gee*

**Statistics**

True or false? The following linear equation, y = b0 + b1x, is a regression line with y-intercept b0 and slope b1.
*May 19, 2011 by Bill*

**statistics**

The data set given below has y^ = 3x - 5 for its regression equation. Find the standard error of estimate. x 3 2 5 8 y 4 1 10 19 A) 1.29 B) 0 C) 2.06 D) 0.17
*March 23, 2012 by ericka *

**Statistics Help!**

1. What does a stepwise regression analysis do? 2. What tests are used for longitudinal studies with 1 or more dependent variables?
*December 20, 2012 by Anonymous*

**statistics**

For certain x and y series which are correlated, the two lines of regression are 5x-6y+9=0 , 15x-8y+130=0. The correlation coefficient is :
*May 19, 2013 by anand nanda*

**statistics**

8.Jean Siskel is an entertainment analyst for West Coast Securities. He is trying to develop a model to estimate gross earning generated by a new movie release. He has collected the following data on 20 movies: Gross Earnings, Production Costs, Promotion Costs, and if the ...
*May 8, 2014 by Mary*

**statistics**

8.Jean Siskel is an entertainment analyst for West Coast Securities. He is trying to develop a model to estimate gross earning generated by a new movie release. He has collected the following data on 20 movies: Gross Earnings, Production Costs, Promotion Costs, and if the ...
*May 8, 2014 by Russel*

**Statistics**

True or False In Regression Analysis if the variance of the error term is constant, we call it the Homoscedasticity property.
*December 5, 2010 by Ben*

**Statistics**

To conduct a valid regression analysis, both x and y must be approximately normally distributed. True False
*November 5, 2012 by Mike*

**Statistics**

To conduct a valid regression analysis, both x and y must be approximately normally distributed. True False
*November 6, 2012 by Mike*

**Maths **

y= ae^(bt)sin(kt) Use a sine regression to determine k, the period of oscillation of this system. State the regression equation and superimpose its graph on that of the data set. help?
*June 5, 2011 by Georgia*

**Statistics**

Are these questions below true or false? I am stuck. I think 1 is true and 3 is false 1. In Regression Analysis if the variance of the error term is constant, we call it the Homoscedasticity property. 2. In simple linear regression analysis, if the error terms exhibit a ...
*November 29, 2010 by Logan*

**math - regression line - thank you**

The question states: Plot the regression line from D = 40 to D = 300. My question: Do you extend the line beyond those 2 points (as in going towards the axis) or does the regression line just connect those 2 points like a line segment? Thank you
*January 31, 2013 by Sejul*

**statistics**

A multiple regression model has the form: As x2 increases by 1 unit, holding constant x1, then the value of ywill increase by: ŷ=5.25 +2.5x©û+4x ©ü?
*August 25, 2009 by Danny*

**statistics**

Develop the estimated regression equation to predict the city score, given the Recession Resistance rating alone
*April 18, 2011 by Jennifer*

**Statistics**

The residual sum of the squares is the numerator portion of the formula for the variance of y about the regression line. True False
*November 5, 2012 by Mike*

**Statistics**

The residual sum of the squares is the numerator portion of the formula for the variance of y about the regression line. True False
*November 6, 2012 by Mike*

**statistics**

Job Sat. INTR. EXTR. Benefits 5.2 5.5 6.8 1.4 5.1 5.5 5.5 5.4 5.8 5.2 4.6 6.2 5.5 5.3 5.7 2.3 3.2 4.7 5.6 4.5 5.2 5.5 5.5 5.4 5.1 5.2 4.6 6.2 5.8 5.3 5.7 2.3 5.3 4.7 5.6 4.5 5.9 5.4 5.6 5.4 3.7 6.2 5.5 6.2 5.5 5.2 4.6 6.2 5.8 5.3 5.7 2.3 5.3 4.7 5.6 4.5 5.9 5.4 5.6 5.4 3.7 6.2...
*September 21, 2010 by chris*

**math**

Use exponential regression to model the price P(t) as a function of time t since 1994. Include a sketch of the points and the regression curve. (Round the coefficients to 3 decimal places.)
*October 7, 2010 by liz*

**statistics**

Pre- study scores versus post- study scores for a class of 120 college freshman english students were considerated. The residual plot for the least squares regression line showed no pattern. The least squares regression line was y^=0.2+0.9x withwith a correlation coefficient r...
*September 13, 2012 by Gee*

**business statistics**

When autocorrelation of the residuals is present, what effect can this have on interval estimation and significance tests regarding the regression model involved?
*August 17, 2009 by Yadira M*

**Statistics**

Simple Linear Regression Analysis 2. Weight of Car: Miles gallon – Do heavier cars really use more gasoline? The following data were obtained from Consumer Reports (Vol 62 no. 4). Weight of car is in hundreds of pounds. Car Weight 27 44 32 47 23 40 34 52 MPG 30 19 24 13 29 17 ...
*December 7, 2011 by Kris*

**Algebra 2 **

A data set has the following point: (1,8)(2,7)(3,5) The slope of the linear regression line is -1.5 Find the y-intercept of the linear regression.
*May 22, 2012 by Juan*

**MATH**

A data set has the following points: (0, 2), (4, 1), (6, 0) The slope of the linear regression line is -0.32. Find the y-intercept of the linear regression.
*July 11, 2013 by J*

**statistics**

between z=1.45 and z=2.12 greater than z =1.75 or less than z= -0.90 exactly equal to z= 1.50 if the equation resulted from regression analysis involving a set of ten (x,y) data point. what is the value of y when x = 3
*March 7, 2012 by Tonya*

**statistics**

Fit a regression line = a+bXi by the method of Least squares to the given sample information. Observations 1 2 3 4 5 6 7 8 9 10 Income (X)(’00 Rs) Consumption Expenditure(Y)(’00 Rs) 10 44 5 60 25 39 37 51 96 80 94 70 110 80 30 30 79 50 65 40
*March 12, 2012 by Anonymous*

**Statistics**

Calculate a linear regression, the residuals, and the correlation between two variables using the following info: number of people:12,14,15,18,20,16,14,13,18,19,20,22 and cost of drinks:24,30,36,38,65,44,36,30,39,76,80,85
*May 30, 2013 by Kathryn*

**math**

can someone please help me fast before midnight. a)I need the correlation between x and y b)slope of linear regression c)y intercept of linear regression for the points (1,8)(2,6)(3,4)(4,2)(5,5)
*May 5, 2008 by john*

**statistics**

if the equation for the regression line is y1=6x-8,what is the result in a predicted value for y if the value of x =4
*August 18, 2010 by Anonymous*

**Statistics !**

Hi I have calculated some statistics using a spreadsheet program and I have to compare three slopes of regression and their significance level in an energy species hypothesis.. -2.11 level of significance is 5% -4.73 level of significance is 1% -4.13 level of significance is 1...
*June 4, 2009 by Gary*

**Statistics**

Suppose a data set has a linear regression line of y = 6 -0.8x. If the mean of the x's is 5, what is the mean of the y's? 2 5 10 6 None of the above
*February 18, 2013 by Lindsey*

**statistics**

how do I find s subscript x and s subscript y for b1 = r(Sy/Sx)? Found in linear regression.
*October 22, 2007 by Rebecca*

**Statistics**

Anyone know how to get me started? Calculate b0 and b1 and make an equation of regression line for the set of data given in Table 3 Table 3 x y 1 12 2 15 3 16 5 18 6 21 8 23
*April 3, 2010 by Statistics DUMB*

**statistics**

The following data on the number of iron workers in the United States for the years 1978 through 2008 are provided by the U.S. Bureau of Labor Statistics. Using regression techniques discussed in this section, analyze the data for trend. Develop a scatter plot of the data and ...
*October 2, 2011 by Anonymous*

**statistics**

12) The regression equation Credits = 15.4 - .07 Work was fitted from a sample of 21 statistics students. Credits is the number of college credits taken and Work is the number of hours worked per week at an outside job. A) Interpret the slope. B) Is the intercept meaningful? ...
*September 27, 2010 by kim*

**Statistics**

The eggs of a species of bird have an average diameter of 23 mm and an SD of 0.45 mm. The weights of the chicks that hatch from these eggs have an average of 6 grams and an SD of 0.5 grams. The correlation between the two variables is 0.75 and the scatter diagram is roughly ...
*March 15, 2013 by Kimberly *

**Business Statistics**

Given the least squares regression line = -2.88 + 1.77x, and a coefficient of determination of 0.81, the coefficient of correlation is: A) -0.88 B) +0.88 C) +0.90 D) –0.90 I picked C +0.90
*March 15, 2009 by Stuart*

**Precalculus / Statistics**

I have a question about residual plots and regression equations. The data is: X Y 1 6.1 2 5.5 3 9.8 4 10.6 5 14.2 6 21.5 7 29.9 8 37.2 9 50.6 10 64 11 77.6 What function fits this data the best, between Exponential, Linear, Quadratic, and Power. Also how do you make residual ...
*May 24, 2007 by Ryan St. Laurent*

**Statistics**

a procedure in REGRESSION NALYSIS WHERE PREDICTOR OR INDEPENDENT VARIABLES ARE CODED AS 1 OR 0 (REPRESENTING CATEGORIES) AND CAN BE USED TO PRODUCE ANOVA TABLES UNDER THE GENERAL LINEAR MODEL IS KNOWN AS?
*April 5, 2014 by Jo*

**Statistics**

A procedure in regression analysis where Predictor or Independent Variables are coded as 1 or 0 (representing categories) and can be used to produce ANOVA Tables under the General Linear Model is known as…?
*April 6, 2014 by C*

**Statistics**

In reagards to correlation and regression how can that be applied to accounting. I am trying to find some websites where i could apply one of the above to accounting.
*April 30, 2008 by Caryn*

**statistics**

the following sample observations were randomly selected: x: 2,5,6,8,9,11,15 y: 22,23,16,18,19,13,12 a)calculate the correlation coefficient, r b) determine the regression equation c) determine the value of Y when X=20
*November 29, 2010 by skitter*

**Math**

A perfect positive or negative correlation means that A) the explanatory causes the y-variable. B) 100% of the variation is explained. C) we get the same regression equation if we switch the x and y variables. D) the slope of the regression equation is 1.0 I chose B
*September 18, 2013 by Robby*

**Stats**

x y 1 -10.0 2 -20.0 3 -30.0 4 -40.0 5 -50.0 - What would be the slope of this regression line? - Would the correlation between x and y be positive or negative? - How would you interpret these data in terms of linear regression?
*October 25, 2011 by Jen*

**Statistics**

True or False, In simple linear regression analysis, if the error terms exhibit a positive or negative autocorrelation over time, then the assumption of constant variance is violated.
*December 5, 2010 by Zack*

**Statistics**

Determine if a linear relationship exists between unemployment rates and cost of living indexes by constructing a scatter chart and adding a trend line. What is the regression model and R2?
*April 20, 2012 by Tiffany*

**Statistics**

Height (ft) Interval after (min) 96 68 111 80 76 66 91 72 66 58 108 79 116 84 91 79 The data show the time intervals after an eruption (to the next eruption) of a certain geyser. Find the regression equation, letting the first variable be the independent (x) variable. Find the...
*February 12, 2014 by Stephanie*

**Statistics**

12.22 A regression was performed using data on 16 randomly selected charities in 2003. The variables were Y = expenses (millions of dollars) and X = revenue (millions of dollars). (a)Write the fitted regression equation. (b)Construct a 95 percent confidence interval for the ...
*September 26, 2010 by Kim*

**Business Statistics**

If the total variation in y values is 200, and the variation explained by regression line is 180, then the coefficient of determination is equal to __________. A) 1.11 B) 0.90 C) 0.81 D) 1.21 I picked D 1.21
*March 15, 2009 by Stuart*

**statistics**

The scatter diagram of the lengths and widths of the petals of a type of flower is football shaped; the correlation is 0.8. The average petal length is 3.1 cm and the SD is 0.25 cm. The average petal width is 1.8 cm and the SD is 0.2 cm. (a)One of the petals is 0.2 cm wider ...
*March 28, 2013 by pat*

**STATISTICS**

The following data represents the monthly natural gas consumption (in hundreds of cubic feet) for a family for a random sample of nine months selected from five years of data. The other variable is Degree-days which is a measure of temperature. Degree-days are the number of ...
*April 16, 2013 by Bettie*

**statistics**

Which of the following is not a consideration in determining the goodness of fit of a model? a. the value of r^2 b. the slope of its residual plot c. the existence of influential points d. the existence of pattern in the residual points e. all of these are considerations I ...
*December 25, 2007 by Anonymous*

**please help - maths**

Data are collected on the average second-hand price of a particular model of car, from back copies of car trading magazines. The model of car was manufactured in 2000. Year 2001 2002 2003 2004 2005 Average price (£) 11015 5920 4123 3171 2587 Taking 2001 as year 1, 2002 as year...
*May 18, 2007 by carrie*

**statistics**

At the beginning of the semester, students who registered for a statistics course were randomly assigned to two sections, each taught by a different instructor. At the end of the semester, we would like to test whether there are differences in performance on the final exam ...
*May 1, 2014 by April*

**statistics**

a mathematics professor wishes to analyze the relationship between the number of papers graded by his department's student homework graders an the total amount of money paid to the graders. He collects data for 12 randomly chosen graders and uses MINITAB to do the regression ...
*April 19, 2010 by Anonymous*

**Statistics**

Good Afternoon, Hope everyone will have a nice weekend. I am sorry to bother you all, but I am failing statistic. Can someone give me an example of this and example of a regression hypothesis. Thank you
*March 13, 2015 by mary ann*

**Regression Analysis**

1)Quantity of Beef 2)Price of Beef 3)Price of Pizza 4)Price of Coke 5)Income 1- list and explain each of the components of your regression model, both the dependent variable and the independent variables 2-list each of the independent variables, hypothesize the sign of the ...
*September 30, 2009 by Peter*

**statistics**

Automobile racing, high-performance driving schools, and driver education programs run by automobile clubs continue to grow in popularity. All these activities require the participant to wear a helmet that is certified by the Snell Memorial Foundation, a not-for-profit ...
*August 8, 2012 by Anonymous*

**Statistics**

Using the following information find a 95% confidence interval for the intercept in the regression of measured distance on recession velocity. VARIABLE COEFFICIENT STANDARD ERROR Constant 0.3391 0.1185 Velocity 0.001373 0.000227 T-STAT P-VALUE 3.369 0.0028 6.036 0.0000045 Est...
*March 14, 2007 by MMK*

**statistics**

Investment analysts generally believe the interest rate on bonds is inversely related to the prime interest rate for loans; that is bonds perform well when lending rates are down and perform poorly when interest rates are up. Can the bond rate be predicted by the prime ...
*July 8, 2013 by Tony*

**statistics**

a sales manager used linear regression to find the positive linear relationship between advertising expenditures and sales. The amount of advertising expenditures used to generate the regression equation ranged from $8,000 to $45,000. The sales manager wants to use the ...
*December 9, 2007 by tar*

**statistics**

Healthy breakfast contains the rating of 77 cereals and the number of grams of sugar contained in each serving. A simple linear regression model considering "sugar" as the explanatory variable and "rating" as the response variable produced the following regression line: rating...
*September 19, 2012 by Gee*