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Which of the following R code would give the p-value for fiber that is in the last column of the regression output? Hint: Think carefully about whether you are looking at a one-sided (left-/right-tail) or a two sided alternative hypothesis. 

Peter returned a p-value of 0.025 from the appropriate test for heteroscedasticity. The null hypothesis was that there is homoskedasticity in the regression model. What should he conclude at the 0.05 level?

Which of the following is the null and alternative hypothesis used to calculate the p-value for the density variable in the regression output?

The operating expenses of a distributor were 38% of gross sales. If the operating expenses were $4,250.00, what were the gross sales? 

The cosmic law of business says you can profitably excel by doing any two of three things.  Which is not one of those things?

Camille’s objective is to understand the sommeliers’ wine rating system. Although she is using a dataset that is based on ratings for a selection of wines for this purpose, she hopes to make general claims about how different factors impact wine rating. Which of the following is true about her objective?

Which of the following is a correct interpretation of the coefficient on generalmills in the multivariate regression context? Recall that generalmills is an indicator variable, which means that it equals 1 for all observations on general mills’ products, and equals 0 for observations on products from other cereal brands.  Read all options carefully.

If fixed acidity increases by 1 unit, then holding all other variables fixed, what is the impact on the wine quality? Use alpha=0.10.

How many of the regression coefficients in Camille’s model are statistically significant at the 0.10 level?

If alcohol content decreases by 5 units, then holding all other variables fixed, what is the impact on the wine quality? Use alpha=0.10. Note that the question is about the impact of an an x-variable decreasing, and not increasing. Be careful about the direction of impact.