Question ID 16114	Assume that you have a data frame in R. Which function would you use to display descriptive statistics about this variable?
Option A	summary
Option B	str
Option C	attributes
Option D	levels
Correct Answer	A

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Update Date and Time 2017-12-14 02:56:23

 

Question ID 16115	Refer to the exhibit. You are asked to write a report on how specific variables impact your clients sales using a data set provided to you by the client. The data includes 15 variables that the client views as directly related to sales, and you are restricted to these variables only. After a preliminary analysis of the data, the following findings were made: 1. Multicollinearity is not an issue among the variables 2. Only three variablesA, B, and Chave significant correlation with sales You build a linear regression model on the dependent variable of sales with the independent variables of A, B, and C. The results of the regression are seen in the exhibit. Which interpretation is supported by the analysis?
Option A	Variables A, B, and C are significantly impacting sales, but are not effectively estimating sales
Option B	Variables A, B, and C are significantly impacting sales and are effectively estimating sales
Option C	Due to the R2 of 0.10, the model is not valid the linear regression should be re-run with all 15 variables forced into the model to increase the R2
Option D	Due to the R2 of 0.10, the model is not valid a different analytical model should be attempted
Correct Answer	A

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