Question 19 • Probability and Statistics with Applications Honors Sem-2-FL-1210300 (2024-2025)
A government agency constructs a 95% confidence interval to estimate the mean amount of pollution in a city’s river. Assume that all conditions have been met. The one-sample t-interval is (1.26, 3.91).
Answer
A
No. Because 4.00 is close to the upper bound of the interval, it is reasonable to believe the river is not contaminated.
B
No. Because the interval representing the mean amount of pollution is entirely below 4.00, it is reasonable to believe the river is not contaminated.
C
Yes. Because 4.00 is close to the upper bound of the interval, it is reasonable to believe the river is contaminated.
D
Yes. Because the interval representing the mean amount of pollution is entirely below 4.00, it is reasonable to believe the water is contaminated.