please help For all parts of this problems, unless explicitly told otherwise, yo

Question

please help

For all parts of this problems, unless explicitly told otherwise, you will receive zero credit if you use built-in functions such as sum to compute the solution to the problem. You are allowed to call any functions you wrote in previous parts of the problem. Write a function that computes the sum of a sequence. The values to add will be stored in an array x that will be passed into your function as an argument. Your function should return the sum s that satisfies the following equation: Write a fund ion that computes the mean value of a sequence. The values to average will be stored in an array x that will be passed into your function as an argument. Your function should return the mean value x_bar that satisfies the following equation: Write a function that computes the sum of squared residuals about the mean (Si), which can be computed using the following formula: Your function will receive the array x as an input argument, and should return the value of S_t. Write a function that computes the standard deviation of a sequence. The variance can be computed using the following formula: Your function will receive the array x as an input argument, and should return the value of Find the sum, mean, and standard deviation of the data series X = [25.70.380,550.610.1220.830.1450] . Show that your answers match the results given by the MATLAB functions sum(), meanO and std().

Explanation / Answer

a)

function [total] = FindSum(x)

l = size(x);

total = 0

for i = 0:l-1

total = total + x(i);

end

b)

function [mean] = FindMean(x)

total = FindSum(x)/size(x);

c)

function [squareSum] = FindSquare(x)

mean = FindMean(x);

squareSum=0;

l = size(x);

for i = 0:l-1

squareSum = squareSum + (x(i)-mean)^2;

end

d)

function [stdDev] = FindStdDev(x)

stdDev = sqrt(1/(size(x)-1)*FindSquare(x));

e)

sum = 5135

mean = 641.875

stdDev = 475.4336

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