13_If you have the variable of different colors (color) and their sales value (sales), and see the variances of colors, you write .. Select .... one: a. sapply(color,sales,var) b. tapply(sales,color,var) c. tapply(var,sales,color) d. sapply(var,color,sales)

13_If you have the variable of different colors (color) and their sales value (sales), and see the variances of colors, you write .. Select .... one: a. sapply(color,sales,var) b. tapply(sales,color,var) c. tapply(var,sales,color) d. sapply(var,color,sales)

Principles of Economics 2e

2nd Edition

ISBN:9781947172364

Author:Steven A. Greenlaw; David Shapiro

Publisher:Steven A. Greenlaw; David Shapiro

ChapterA: The Use Of Mathematics In Principles Of Economics

Section: Chapter Questions

Problem 1RQ: Exercise A1 Name three kinds of graphs and briefly state when is most appropriate to use each type...

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Question

Economics
13_If you have the variable of different colors
(color) and their sales value (sales), and see
the variances of colors, you write .. Select
.....
one:
a. sapply(color,sales,var) b.
tapply(sales,color,var) c. tapply(var,sales,color)
d. sapply(var,color,sales)

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