Chapter 8 Descriptive States in data frames.

• mean() - finds the mean of a vector

• sd() - find the standard deviation

• median() - finds the median

• max() - finds the max

• min() - finds the min

• range() - returns the range of a vector

• summary() - give min, 1st quantile, Median, Mean, 3rd Quantile and Max.

# average hits
mean(hits_data_frame$Hits)

## [1] 2

# standard deviation of hits. 
sd(hits_data_frame$Hits)

## [1] 1.581139

# median hits
median(hits_data_frame$Hits)

## [1] 2

# max hits
max(hits_data_frame$Hits)

## [1] 4

# range of hits
range(hits_data_frame$Hits)

## [1] 0 4

# Summary statisitics 
summary(hits_data_frame$Hits)

##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##       0       1       2       2       3       4

8.0.1 Challenge

Filter the hits_data_frame to to find the person with the highest batting average. Change the playerID “best_player”