Can’t see your answer choices but the absolute value of -3 is 3 so I would say 3 is your answer
Answer:
1st is correct
Step-by-step explanation:
Like charges repel each other.
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Name Score
Julia 650
Andrew 550
Jason 380
Cathy 720
Jessica 710
Robert 550
Point estimate for the mean score:
Sample mean = sum of all observations / number of observations
sample mean = (650+550+380+720+710+550) / 6
sample mean = 3560 / 6
sample mean = 593.33
The point estimate for the mean score is 593.33
Solution :
This is the two tailed test.
The null hypothesis and the alternate hypothesis is as :
Null hypothesis is 
Alternate hypothesis is 
Therefore, the critical value of z is :
Now the test statics is :
The test statics is 0.878
We see that it is a right tailed test.
= 0.3800
Thus , P-value > α
So we fail to reject the null hypothesis.
