(f) Which confidence interval estimate has a larger interval? Why? Interval estimate for the mean baby weights for the newborns with the following values: (e) Using the model you found to be performing better in (d), construct 95 percent confidence They are different, which model is performing better? (d) Compare the significant regression models obtained in (b) and (c). What is the model found by the PHStat stepwise regression? Run stepwise regression (usingīackward elimination approach) to obtain a significant regression model. (c) Now use the stepwise regression available in PHStat. What is the significant model found after completing the process (b) These process steps described above will result in a regression model that has significant (ii) If some independent variables in the model are not significant, repeat Step 2. (i) If all independent variables are significant, stop. Check the independent variables for significance at a=0.05. With the variable that has the highest p-value first. Remove the non-significant independent variable(s), one at a time, starting With all independent variables significant. Eliminate non-significant variables, one at a time, until you obtain a regression model (c) Which independent variables are NOT significant in this model at a = 0.05? (b) What percent of the total variation in baby weights is explained by this regression? (a) What is the estimated regression equation with these six independent variables? (gestation, height, smoke, age, weight, and parity). Determine the estimated regression equation containing ALL six independent variables (a) Follows the process steps described below to obtain a significant regression model. Model Building – Stepwise Regression (Backward Elimination Method): The Child Health and Development collected data to study the relationship between the infant weightsĪ sample of 40 observations are given in the next worksheet (Note that this homework has 2 questions)
#How to get to phstat in excel how to
will show you the The Correct way on how to answer and submit this assignment, so you could take a look at that to help how to format to answer the questions. Do not do more than is asked please.Īlso the Survey Data ISSCM491.xlsx file is attached as (if needed) to look at this for this homework assignment (if it is) mentioned inside hw8.xlsx
– the file for this assignment is hw8.xlsx. – everything else should be pretty straight forward in the excel spreadsheet it shows and tells you exactly what to do.
#How to get to phstat in excel download
There will be a file you can download ( PHStat.xlam PHStat.xlam )if you do not have PhStat, and also another file to show you how to use PhStat to get the answers. ISSCM 491 Survey Data Using PhStat My Occupational group is Group # 3 Admin Support
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