Solve equation 3z=36
2 answers:
Answer:
Step-by-step explanation:
Z is the variable in this equation in this problem that we are looking for. Since z is next to the number 3. That means that whatever z is, it will be multiplied by 3.
3z = 36
The number we are trying to match is 36, so what times 3 equals 36?
Just do backwards equation,
z = 12
3(12) = 36
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Answer: (15.47, 24.53)
Step-by-step explanation:
We know that the confidence interval for population mean is given by :_
, where n= sample size.
= standard deviation.
= sample mean.
z*= Critical value.
Given : n= 450
Critical value for 95% confidence = z*=1.96 [From z-value table]
Then, the 95% confidence interval will be :-
Hence, the 95% confidence interval for the mean change in score μ μ in the population of all high school seniors. : (15.47, 24.53)
