Answer: -3.0593
Step-by-step explanation:
The test statistic for the difference between two population mean (when population standard deviations
are known ) is given by :-

where ,
= Sample sizes taken from two populations 1 and 2.
= Difference between two Sample mean.
= Standard deviations of populations 1 and 2.
As per given , we have
We assume that the data follows a normal distribution.
Then, the test statistic will be :-
Hence, the test statistic= -3.0593
3x-x=(2x+4)-(x+4)? That is my answer but it might not be right
I’d say the answer would be d
Answer:
this is correct answer
Step-by-step explanation:
you supports to write this