00:01
Hello, let's have a look on the question.
00:04
For placebo group, we have x1 bar is equal to 14, s is equal to 3 .87, n1 is equal to 27.
00:22
For treatment with st.
00:29
Jonas, same jones, x2 bar is equal to 13 .4, standard deviation of sample is 3 .22 and sample size is n2 is equal to 27.
00:48
Now for the first part, calculate a 95 % competence interval for difference in mean.
01:01
So difference in mean is mu 1 minus mu 2.
01:05
So here this will be equal to alpha minus 1 minus 95 % which is equal to 1 minus 0 .95.
01:16
So alpha will be equal to 0 .05.
01:19
This is level of significance.
01:20
Now we need to find out critical value of t at alpha is equal to 0 .05 and degree of freedom, df, which is equal to n1 plus n2 minus 2, that is equal to 27 plus 27 minus 2, that is 52.
01:46
This is the degree of freedom.
01:47
So the value of p critical at alpha is equal to 0 .05 and degree of freedom 52 will be equal to 0 .207.
01:59
This is the critical value...