Answer:
2
Step-by-step explanation:
9x + 9 = 25 + x
8x = 16
x = 2
make sure to ask if you need any further guidance.
Answer: 40 mi/h
Step-by-step explanation:
it goes up 80 and over 2, so the rate of change is 80/2 = 40 mi/h
Answer:
The probability that the first failure occurs among the five devices is given by
(a) 9 months =
(b) 12 months=
Step-by-step explanation:
probability is given as the; number of required outcome/ total number of possible outcome.
a. The standard error is equal to the standard deviation divided by the square root of the sample size:
SE = (23 ppm)/√18 ≈ 5.42 ppm
b. The t statistic is given by the difference between the true and sample means, divided by the standard error:
t = (192 ppm - 180 ppm)/SE ≈ 2.21
c. The p-value is approximately 0.0204.
d. Since p < 0.05, the difference is significantly different, so we reject the null hypothesis.
e. A type I error might have occurred, since it's possible that the null hypothesis was true, but we ended up rejecting it.
