Given that,
Sample size= 83
Mean number= 39.04
Standard deviation= 11.51
We know the critical t-value for 95% confidence interval which is equal to 1.989.
We also know the formula for confidence interval,
CI=( mean number - critical t-value*standard deviation/(sample size)^(1/2), mean number + critical t-value*standard deviation/(sample size)^(1/2))
So, we have
CI= (39.04 - 1.989*11.51/83^(1/2), 39.04 + 1.989*11.51/83^(1/2)
CI= (39.04 - 2.513,39.04 + 2.513)
CI= (36.527,41.553)
Therefore, 95% confidence interval for these data is (36.527,41.553), and this result interpret that the true value for this survey sample lie in the interval (36.527,41.553).
81, if you mean 9 Squared.
Answer:
Answer is B. Y=31
Step-by-step explanation:
4y + 228 = 352
(4)(y) = 352 -228
y = 124/4
y = 31
Answer:
Option (2) is correct.
Step-by-step explanation:
Given expression 
We have to find an equivalence value to the expression.
<u> Radical rule</u>,
Also,
Consider the given expression,
Applying radical rule to 
Thus, the expression becomes,
Thus, option (2) is correct.
