State the conclusion based on the results of the test. The mean of the pressure required to open a certain valve is known to be
mu equals 8.4 psi. Due to changes in the manufacturing process, the quality-control manager feels that the average pressure has increased. The null hypothesis was rejected. Choose the correct answer below. A. There is not sufficient evidence that the mean of the pressure required to open a certain valve has not changed.
B. There is not sufficient evidence that the mean of the pressure required to open a certain valve has increased.
C. The mean of the pressure has not changed.
D. The mean of the pressure has increased.
E. There is sufficient evidence that the mean of the pressure required to open a certain valve has increased.
F. There is sufficient evidence that the mean of the pressure required to open a certain valve has not changed.
E. There is sufficient evidence that the mean of the pressure required to open a certain valve has increased.
Step-by-step explanation:
Null hypothesis(H0): μ= 8.4 psi
Alternative hypothesis (H1): μ> 8.4 psi
If the test was due with a representative minimum number of observations. And, if the null hypothesis was rejected, then the mean pressure required to open a valve is greater than 8.4 psi. We can conclude that (at a certain level of confidence) there is sufficient evidence that the mean of the pressure required to open a certain valve has increased.
You can't take x out and you can't take 6 out, 15 doesn't have x and 6 doesn't go into 15, but 3 can go into both 6 and 15 so take out 3. you cannot go any farther.