Not thebayang. the bayang?
Assign variables to the groups. "S" stands for senior citizens and "C" stands for children.
3S + 9C = 75
8S + 5C = 67
We must cancel one of these variables out; I did this by multiplying the top equation by 8 and the bottom equation by 3.
24S + 72C = 600
24S + 15C = 201
Subtract these two expressions and you get C = 7. Plug 7 in for C into any of the above expressions and solve for S. You will find that S = 4.
Answer:
(22.74,24.06) is the required 95% confidence interval for the population mean ACT score of University of Oklahoma students.
Step-by-step explanation:
We are given the following in the question:
Sample size, n = 121
Sample mean = 23.4
Sample standard deviation = 3.65
Level of significance = 0.05
Degree of freedom
95% Confidence interval:
Calculation of critical value:
Putting the values, we get,
(22.74,24.06) is the required 95% confidence interval for the population mean ACT score of University of Oklahoma students.
Answer:
C
Step-by-step explanation:
for f(x) and g(x) to be the inverse of each other, then
f(g(x)) = g(f(x)) = x ← must be true
This is shown in option C