CHEGG A 10-year study conducted by the American Heart Association provided data on how age, blood pressure, and smoking relate to the risk of strokes. Data from a portion of this study follow. Risk is interpreted as the probability (times 100) that a person will have a stroke over the next 10-year period. For the smoker variable, 1 indicates a smoker and 0 indicates a nonsmoker. Click on the datafile logo to reference the data. Enter negative values as negative, if necessary. Use the best subset regression procedure to predict risk of stroke. Which independent variable provides the best regression model if only one independent variable is in the model? Age Which independent variables provide the best regression model if two independent variables are in the model? Age and Smoker Using the best regression procedure, how many independent variables are in the highest adjusted R 2 model? What is the value of R 2(adj)? Note: report R 2(adj) as a percentage (to 1 decimal). % Show the best regression model below (to 3 decimals, if necessary). Enter 0 if the independent variable listed below is not in your best regression model. Rating = + Age + Pressure + Smoker

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

8496 cars

step-by-step explanation:

the two may have that, even a breakdown is probably offered

c.

step-by-step explanation:

because first you have to add the 4x, 9x, and the 7x together and you get 20x and then you add the last numbers up and you get 5and then you put the subtraction sign in there and that's how you get the answer.