Answer:
13or-13
Step-by-step explanation:
x+5=18 -5
x=15
Answer:
you should've paid attention in class :/
Step-by-step explanation:
Answer: It took her 11 days to read Part 1 of the book.
Step-by-step explanation:
380 - 20d = 160
Subtract 380 from each side
-20d = -220
Divide each side by -20
d = 11
Answer:
b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.
Step-by-step explanation:
Confidence interval:
Confidence level of x%
We build from a sample.
Between a and b.
Intepretation: We are x% sure that the population mean is between a and b.
In this question:
90%
45 CEO's
Between ($139,048, $154,144).
So
We are 90% sure that the mean salary of all CEO's falls within this interval.
The correct answer is:
b) We are 90% confident that the mean salary of all CEOs in the electronics industry falls in the interval $139,048 to $154,144.