00:01
Hey there, welcome to numerates.
00:03
So we have a study going on here where we compare the means of two independent populations.
00:08
Although the standard deviations of the two populations are unknown, we are asked to state what statistical tests are we going to use for this situation.
00:19
So we have four different ones.
00:21
So let's list them out.
00:22
We have z test.
00:28
Z test is usually used when the population is known.
00:36
In this case, we have a z test.
00:37
It's is not known right the population standard deviation is not known therefore a won't be correct now let's see what's b so for b is the kai square test kai square test for kai square test we are basically comparing the standard deviation and in this case we're not comparing standard deviation we're comparing the means or we basically comparing the means of two independent populations.
01:19
So with that we have c.
01:25
So for c, it's a t test.
01:31
T test is used when the population is a no.
01:39
Population standard deviation.
01:43
So different kai -cat, i mean t -tests makes sense...