00:01
In this question we have been given to test the claim and here we can say that null hypothesis will be h0 and here the value of p is 0 .20 versus the value of alternate hypothesis which can be written as p and that is lesser than 0 .20.
00:16
So here it can be said that we are dealing with a left tail test and the population are the patients who use a particular medication and the population proportion is equals to 0 .20.
00:29
So it was the first part of this very problem and now we are talking about the second part and then we will be here finding out the answer for the third part where the sample is n and that is equals to 400 patients selected for clinical trial.
00:45
So it can be here written over here as patients.
00:48
So now we can say that the conditions for normal distribution are first one is that the sample must be large enough and randomly selected.
00:57
So here we are having the sample size which is definitely greater than 30.
01:01
So it is here basically satisfied this very condition.
01:05
Now if we talk about the another condition then it says that n times p will be here 1 minus p and that should be greater than equals to 10.
01:14
So here it will be 400 multiplied with 0 .20 and then it is 0 .80.
01:20
So this is definitely equals to 64 and this is also satisfied...