Question

You want to use the summarize() and sd() functions to find the standard deviation of the rating for your data. Add the code chunk that lets you find the standard deviation for the variable Rating.

A
0.4458434
B
0.4780624
C
0.2951794
D
0.3720475

Answer 1

To find the standard deviation of the rating for the data, you can use the summarize() and sd() functions as follows:

# summarize the rating column and store the result in a variable

summary = summarize(df$Rating)

# calculate the standard deviation of the rating

stddev = sd(df$Rating)

# print the standard deviation

print(stddev)

Here, "df" is the name of the data frame that contains the Rating column. The summarize() function calculates various summary statistics for the Rating column, including the mean and standard deviation. The sd() function calculates the standard deviation of the Rating column.

Note that the summarize() function is not a built-in function in R. It is a user-defined function that may be part of a package or created by the user. The sd() function, on the other hand, is a built-in function in R that calculates the standard deviation of a numeric vector.

I hope this helps! Let me know if you have any questions.