SOLUTION: Consider a study conducted to evaluate the effectiveness of a new treatment to stop smoking. Before the study, it was known that the average time to quit was 2.3 months, with a sta

Algebra ->  Probability-and-statistics -> SOLUTION: Consider a study conducted to evaluate the effectiveness of a new treatment to stop smoking. Before the study, it was known that the average time to quit was 2.3 months, with a sta      Log On


   

Question 1198359: Consider a study conducted to evaluate the effectiveness of a new treatment to stop smoking. Before the study, it was known that the average time to quit was 2.3 months, with a standard deviation of 1.1. Using a sample of 50 adults on the new treatment, the sample average time was 1.9 months.
The p-value for the test value should be one of the following. Which one?
A) 0.0038
B) 0.3594
C) 0.9962
D) 0.6406
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
Depends on the Confidence Level
and whether using one or two tailed
Using α = 0.05 and one tailed
t-value = -2.5713 t+=blue%28-.4%29%2Fblue%281.1%2Fsqrt%2850%29%29
p-value = .0132
.0132 < .05, reject Ho
________
with two tailed:
Ho: mean = 2.3
Ha: mean ≠ 2.3
p = .0066