Kata

I have no clue how these intervals work. I guessed how to handle 99 and 100 as upper limit. I can't approve this kata in its current form. But then again, this kata has been in beta for 10 years, so you probably don't care anymore ;)

add links (to wikipedia) in the description for things like Sturges' rule

This issue is still not fixed!

Number of elements = 30000

[[1, [2, 8], 759, 759], [2, [9, 15], 1349, 2108], [3, [16, 22], 1462, 3570], [4, [23, 29], 1520, 5090], [5, [30, 36], 1897, 6987], [6, [37, 43], 2188, 9175], [7, [44, 50], 2422, 11597], [8, [51, 57], 2837, 14434], [9, [58, 64], 2853, 17287], [10, [65, 71], 2827, 20114], [11, [72, 78], 2909, 23023], [12, [79, 85], 2798, 25821], [13, [86, 92], 2407, 28228], [14, [93, 99], 1703, 29931], [15, [100, 100], 69, 30000]]
should equal
[[1, [2, 8], 759, 759], [2, [9, 15], 1349, 2108], [3, [16, 22], 1462, 3570], [4, [23, 29], 1520, 5090], [5, [30, 36], 1897, 6987], [6, [37, 43], 2188, 9175], [7, [44, 50], 2422, 11597], [8, [51, 57], 2837, 14434], [9, [58, 64], 2853, 17287], [10, [65, 71], 2827, 20114], [11, [72, 78], 2909, 23023], [12, [79, 85], 2798, 25821], [13, [86, 92], 2407, 28228], [14, [93, 99], 1703, 29931], [15, [100, 106], 69, 30000], [16, [107, 100], 0, 30000]]

Python 3 should be enabled ;-)

The issue below is not resolved yet:

Number of elements = 30000

[[1, [2, 8], 759, 759], [2, [9, 15], 1349, 2108], [3, [16, 22], 1462, 3570], [4, [23, 29], 1520, 5090], [5, [30, 36], 1897, 6987], [6, [37, 43], 2188, 9175], [7, [44, 50], 2422, 11597], [8, [51, 57], 2837, 14434], [9, [58, 64], 2853, 17287], [10, [65, 71], 2827, 20114], [11, [72, 78], 2909, 23023], [12, [79, 85], 2798, 25821], [13, [86, 92], 2407, 28228], [14, [93, 99], 1703, 29931], [15, [100, 100], 69, 30000]]
should equal
[[1, [2, 8], 759, 759], [2, [9, 15], 1349, 2108], [3, [16, 22], 1462, 3570], [4, [23, 29], 1520, 5090], [5, [30, 36], 1897, 6987], [6, [37, 43], 2188, 9175], [7, [44, 50], 2422, 11597], [8, [51, 57], 2837, 14434], [9, [58, 64], 2853, 17287], [10, [65, 71], 2827, 20114], [11, [72, 78], 2909, 23023], [12, [79, 85], 2798, 25821], [13, [86, 92], 2407, 28228], [14, [93, 99], 1703, 29931], [15, [100, 106], 69, 30000], [16, [107, 100], 0, 30000]]

k = 1 + 3.32 * log (n)

Log base is not specified. Apparently it's base 10 and not natural log, which is not what typical log means and so it should be clarified.

Sample test is missing a closing parenthesis at the end.

I think I'm right in thinking that the upper bound on the final interval should be "lowest value + intervals * amplitude", and yet I'm seeing odd errors relating to the final interval's upper bound being out by a small amount when the tests are run.

Getting this error on random tests.

Number of elements = 100
Students Results = [29, 77, 97, 73, 62, 28, 58, 86, 47, 67, 29, 85, 73, 55, 11, 43, 19, 63, 43, 20, 92, 57, 73, 56, 11, 90, 57, 89, 87, 80, 17, 26, 19, 85, 88, 38, 98, 93, 86, 94, 34, 24, 34, 17, 80, 78, 58, 55, 78, 39, 35, 35, 80, 65, 22, 36, 86, 65, 70, 15, 64, 63, 98, 84, 43, 47, 83, 11, 97, 36, 68, 7, 72, 27, 87, 54, 76, 70, 13, 63, 8, 54, 24, 79, 50, 44, 63, 97, 41, 98, 67, 49, 49, 67, 59, 88, 97, 87, 2, 62]
[[1, [2, 13], 7, 7], [2, [14, 25], 9, 16], [3, [26, 37], 11, 27], [4, [38, 49], 11, 38], [5, [50, 61], 11, 49], [6, [62, 73], 19, 68], [7, [74, 85], 12, 80], [8, [86, 98], 20, 100]] should equal [[1, [2, 13], 7, 7], [2, [14, 25], 9, 16], [3, [26, 37], 11, 27], [4, [38, 49], 11, 38], [5, [50, 61], 11, 49], [6, [62, 73], 19, 68], [7, [74, 85], 12, 80], [8, [86, 98], 17, 97]]

I believe my solution is correct because the cumulative frequency expected is wrong (97 instead of 100). Could you look into it? Probably some floating point error somewhere.