Help With Statistics & Plotting Bell Shaped Curve

Ted_Grendy

New member
Joined
Nov 11, 2018
Messages
28
Hello all

I am trying to learn more about statistics and wanted to ask the following questions:-

1) Are the following terms mean the same thing:-
Normal Distribution= Gaussian Distribution

2) Does a Normal Distribution data set only contain random error and is free from systematic errors (assume perfect world).

3) I am trying to plot a bell shaped curve for a Normal Distribution data set of 30 measurements with a mean of 40.1484 and a SD of 1.5.
I sort my data into low to high and add the average in the middle but the plot does not show a bell shaped curve (see attached).
How can I plot my measurements to show a bell shaped curve (I have been assured that the data set is a

Thank you.
 

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Jomo

Elite Member
Joined
Dec 30, 2014
Messages
3,276
Hello all

I am trying to learn more about statistics and wanted to ask the following questions:-

1) Are the following terms mean the same thing:-
Normal Distribution= Gaussian Distribution

2) Does a Normal Distribution data set only contain random error and is free from systematic errors (assume perfect world).

3) I am trying to plot a bell shaped curve for a Normal Distribution data set of 30 measurements with a mean of 40.1484 and a SD of 1.5.
I sort my data into low to high and add the average in the middle but the plot does not show a bell shaped curve (see attached).
How can I plot my measurements to show a bell shaped curve (I have been assured that the data set is a

Thank you.
Yes, Normal Distribution= Gaussian Distribution

How can the data be normally distributed if the data is strictly increasing? Why does a bell curve look like it does? Please answer at least this last question!!
 

Dr.Peterson

Elite Member
Joined
Nov 12, 2017
Messages
3,317
Hello all

I am trying to learn more about statistics and wanted to ask the following questions:-

1) Are the following terms mean the same thing:-
Normal Distribution= Gaussian Distribution

2) Does a Normal Distribution data set only contain random error and is free from systematic errors (assume perfect world).

3) I am trying to plot a bell shaped curve for a Normal Distribution data set of 30 measurements with a mean of 40.1484 and a SD of 1.5.
I sort my data into low to high and add the average in the middle but the plot does not show a bell shaped curve (see attached).
How can I plot my measurements to show a bell shaped curve (I have been assured that the data set is a

Thank you.
The bell-shaped curve has to be a histogram. You just plotted the individual values as a bar graph in increasing order, which is not the same.
 
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