Seatbelts is a built-in R time-series, giving the monthly totals of car drivers in Great Britain killed or seriously injured Jan 1969 to Dec 1984. We are interested in some descriptive statistics related to the rear column of the Seatbelts time series. We can access the data directly by using the assignment x<-Seatbelts[,4]. (In R use ?Seatbelts forinfo on this time series.) Remember: x <- Seatbelts[,4]a.Calculate the sample mean of x.1b. Using the R quantile function, find the .70 (70th) percentile of x. 2c. Calculate the interquartile range of x using R. 3d. Calculate the sample median of x. 4e. Calculate a 10/192 trimmed mean for x. 5f. Calculate the sample variance of x. 6g. Calculate the sample standard deviation of x. 7h. What proportion of the x values are within 1.0 sample standard deviations from the sample mean 8i. Calculate the minimum of x.j. What number do you get if you add up the values in x? 10

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A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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