A theater wants to take in 2000 dollars for a certain matinee. Children's tickets cost 5 dollars each and adult tickets cost 10
1 answer:
Answer:
We have the following system of equations:
(2) = x = 350-y . Replace x in equation (1 )
=> 5(350-y)+10y=2000 => y = 241
Replace y=241 in equation (2 ) => x = 350-241 = 109
the number of both children and adult tickets the theater can sell.
Children tickets : 109
Adult tickets : 241
Step-by-step explanation:
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Answer: 95% confidence interval for the difference between the proportions would be (1.31, 1.39).
Step-by-step explanation:
Since we have given that
Number of alluvial wells = 349
Number of quaternary wells = 143
Number of alluvial wells that had concentrations above 0.1 = 182
Number of quaternary wells that had concentrations above 0.1 = 112
Average of alluvial wells = 0.27
Standard deviation = 0.4
Average of quaternary wells = 1.62
Standard deviation =1.70
So, 95% confidence interval gives
alpha = 5% level of significance.
So, 95% confidence interval becomes,
Hence, 95% confidence interval for the difference between the proportions would be (1.31, 1.39).