Question

matlab

Answer 1

@jim_thompson5910

Answer 2

%% 5.21
% Let the vector G = [68, 83, 61, 70, 75, 82, 57, 5, 76, 85, 62, 71,
% 96, 78, 76, 68, 72, 75, 83, 93] represent the distribution of final
% grades in an engineering course.
% (a) Use MATLAB to sort the data and create a bar graph of the
% scores.

% vector G (test scores for engineer students)
G = [68, 83, 61, 70, 75, 82, 57, 5, 76, 85, 62, 71, 96, 78, 76, 68, 72, 75, 83, 93];
newG = sort(G(:)) % sorts scores lowest to highest, lowest starting at the top
bar(newG);
title('Final grades for engineering students');
xlabel('number of students'); ylabel('scores out of 100 points');

% (b) Create a histogram of the scores, using his.
nbins = 20; % number of bins
hist(G, nbins); % displays histogram for 10 bins

Answer 3

so where it says nbins the directions didn't specify how many bins I should use? Do you have any suggesions? I used 15

Answer 4

20

Answer 5

nbins = 20; % number of bins
hist(G, nbins); % displays histogram for 10 bins

you wrote 20 but then you mention 10. Which is it?

Answer 6

haha it's 20

Answer 7

% (b) Create a histogram of the scores, using his.
nbins = 20; % number of bins
hist(G, nbins); % displays histogram for 20 bins

Answer 8

as for your question on how many bins to use, I'm not sure. I think at least 5 or so. So 20 bins is probably good. If you get too big, then things look very scattered out so you may need to lower the bin number