The statistical functions you mention are not available. That was kind of the whole point of that blog post.
About that same time, I started to write another blog post about all of the functions that were available and what they did. It evolved into the blog post that I did publish.
The list of the available functions is available within Canvas. When you are creating a formula question, there is an example right above the toolbar. "What is 5 plus [x]?"
That is followed by a link that says "Need Help?"
Click on the Need Help? link and then switch to the Functions tab.
There is a pull down list (starting with Absolute Value) that provides a list of the functions that are available and a brief explanation of what they do.
Here are the functions that are in that list:
abs acos asin at atan ceil comb cos count deg_to_rad e fact first floor if last length ln log max mean median min perm pi rad_to_deg rand range reverse round sin sort sqrt sum tan
The statistical functions you mention are not available. That was kind of the whole point of that blog post.
About that same time, I started to write another blog post about all of the functions that were available and what they did. It evolved into the blog post that I did publish.
The list of the available functions is available within Canvas. When you are creating a formula question, there is an example right above the toolbar. "What is 5 plus [x]?"
That is followed by a link that says "Need Help?"
Click on the Need Help? link and then switch to the Functions tab.
There is a pull down list (starting with Absolute Value) that provides a list of the functions that are available and a brief explanation of what they do.
Here are the functions that are in that list:
abs acos asin at atan ceil comb cos count deg_to_rad e fact first floor if last length ln log max mean median min perm pi rad_to_deg rand range reverse round sin sort sqrt sum tan
@lic ,
Are you using Legacy Quizzes or New Quizzes?
In the legacy quizzes, it's above the editor. I just pulled this up while writing this response, so it's still there for me.
I don't have new quizzes enabled to check.
Thankfully, you don't have to get a list from within Canvas itself, it's available in the documentation. I believe that the functions in new quizzes is the same, but have not verified this is.
In the Canvas Instructors Guide, there is a lesson called https://community.canvaslms.com/docs/DOC-26355
At the top of that, in the blue notes section, is a link to the Canvas Formula Quiz Question Helper Functions PDF. It contains a list of all of the functions that are available so that you don't have to access them online.
In particular, Canvas uses the asin, acos, atan notation to get at arcsine, arccosine, and arctangent functions.
I'm not sure how you used asin(), but it should have worked if called with proper arguments. Realize that the result is given in radians, not degrees, but it can be nested inside a rad_to_deg() function to get it in degrees. For example,
rad_to_deg(asin(1/2)) should return 30, while asin(1/2) would return the decimal form of π/6.
The normal restrictions on domain and range apply. asin(x) has a domain of [-1,1] and a range of [-π/2,π/2]. If you try asin(2), you should get an error. I'm not sure which one, but NaN (not a number) seems likely.
Finally, and you probably already know this, but while I'm typing I thought I'd throw it out there. Canvas does not have functions for asec(), acsc(), or acot(). They can be obtained using the reciprocal functions and identities like asec(x) = acos(1/x). That is asec(2) = acos(1/2).
Edited 2020-05-15. Had rad_to_degrees instead of rad_to_deg.
If you have log base 3 of 8. You could always use the change of base and do log 8 / log 3 or ln 8/ ln 3.
for example:
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