00:01
Hello students, here we will use t -test for difference of means and the iv means independent variables, independent variables and dv means dependent variables.
00:47
This is iv, this is dv.
00:53
Then the null hypothesis is that there is significant, there is no significant difference in consumption of alcohol by both difference, by both genders.
01:12
There is no significant difference in consumption of alcohol by both gender and h1 is there is significant, significant difference in consumption of alcohol by both genders.
02:07
Then we are asked the test statistics t is equal to x bar minus y bar divided by s into 1 by n1 plus 1 by n2 and take square root of it.
02:38
So degrees of freedom here is n1 plus n2 minus 2.
02:51
So s square can be found by using formula s square summation xi minus x bar whole square plus summation yi minus y bar whole square divided by n1 plus n2 minus 2.
03:14
So x bar is 5 .4 just sum of, do the sum of all the x values and divide it by the number of observation.
03:26
Then y bar is also in the similar way we have to do.
03:32
We will get 9 .9.
03:33
So s square is equal to 72 .4 plus 100 .9 divided by 10 plus 10 minus 2 that is equal to 9 .627 and s is equal to 3 .1027...