Answer: (72.535, 76.665)
Step-by-step explanation:
The confidence interval for population mean is given by :-
, where 
= population standard deviation.
n= Sample size
= sample mean.
= Critical z-value (two-tailed)
Given : 
n= 81
The critical values for 90% confidence interval : 
Now, the confidence interval for population mean would be :
Hence, a 90 percent confidence interval estimatefor the average score of all students. : (72.535, 76.665)
Point C.
f(-3) is basically substituting x = -3 and get the y-value.
So when we substitute x = -3. Focus on x-axis at x = -3 then look up for the y-value. If the y-value is on x = -3 then that's f(-3)
Answer:
simplify the expressions
Step-by-step explanation:
you just have to simplify all the different expression and then you can see the ones that are the same
Answer:
y = 63360x
Step-by-step explanation:
we know 1 mile = 63360 inches
So: y = 63360x
x mile
& y inch
