Question

(a) Write a Ruby function mean that computes the mean value of an arbitrary number of arguments. Function calls mean (1,2,3,4,5) mean 3 ,1 ,and "No arguments". (1) and mean should respectively return tion sigma that uses your function mean and computes the standard deviation of an arbitrary of arguments. Function calls sigma (1,2,1,2)sigma (1) and sigma should respectively return1, o, and "No arguments" (Hint: the standard deviation is the square root of (b) Write a Ruby func variance, and variance is the mean value of squares minus the square of the mean value) (c) Write a Ruby function stat that computes and returns the mean value, standard deviation, and the coefficient of variation v 90 100 sigma/mean of an arbitrary number of arguments. Show the main program that computes and displays the results of function stat for argument stored in three arrays: x, y, and z

Answer 1

def mean(*value)

sum = 0

count = 0.0

for i in value

    sum = sum + i

    count = count + 1

end

if count==0

    return "no argument"

end

return sum/count

end

mean(1,2,3,4,5)

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SEE OUTPUT

main.rb E saved - https://Round 1 def mean (value) 2 ruby 2.5.0p sum 0 count 0.0 3.0 4 for l in va lue sum = sum + 1 count count + 1 7 end if count-0 9 return "no arqument" 10 end return sum/count 12 end 13 14 15 mean (1,2,3,4,5) 16 17