Talk:Documentation/Calc Functions/T.DIST.2T

SF comments

(1) Summary. Suggest replacing with – “Calculates two-tailed test values for the Student's t-distribution (often known more simply as just the t-distribution). The Student's t-distribution is often used to test a hypothesis about a population’s mean when the population’s standard deviation is not known. The Student’s t-distribution can be used with any statistic whose distribution is approximately normal.”.

(2) Returns. Suggest replacing with – “Returns a positive real number in the range 0 to 1 (exclusive) representing the total area under the two tails of the probability distribution function of the specified Student’s t-distribution, lying above the given Number and below -Number.”.

(3) Arguments, 1st paragraph. Suggest changing “t-distribution is calculated” to “two-tailed test value for the Student's t-distribution is to be calculated”.

(4) Arguments, 2nd paragraph. Insert “Student’s” before “t-distribution”.

(5) Arguments, 3rd bullet. Insert “a” before “non-integer”.

(6) Additional details. Please put a “*” character between “tails” and the integration symbol.

(7) Additional details, general. May be worth explicitly stating that T.DIST.2T(x ,y) = 2*T.DIST.RT(x, y) and that T.DIST.2T(x, y) = TDIST(x, y, 2).

(8) Examples 1st example. The formula on the left does not appear to give the value written on the right. Also, this example loses impact because it is not preceded by a similar example but with DegreesFreedom set to exactly 1. Suggest inserting “test value for the” before “Student’s”. Also, insert “a” before “non-integer”.

--Stevefanning (talk) 2020-11-07T23:18:04 (UTC)

Ronnie

all points addressed.

--Ronnie rg8888 (talk) 2020-11-29T17:06:14 (UTC)