Answer: 13
Step-by-step explanation:
Add 3 to each side. That original 3 is cancelled out so you're left with 4x=11. Divide each side by 4 and that leaves you with x = 3.5
Now all you have to do is multiply 4 by 3.5 which is 14. You now have to subtract 1 and your answer is 13.
Answer:
The interpretation is that we are 90% sure that the true average salary of the district is in this interval.
Step-by-step explanation:
x% confidence interval:
A confidence interval is built from a sample, has bounds a and b, and has a confidence level of x%. It means that we are x% confident that the population mean is between a and b.
In this question:
The 90% confidence interval for the average salary of the district is [41500,49750].
This means that we are 90% sure that the true average salary of the district is in this interval.
The first one is A and the second one is A
Answer: B
Step-by-step explanation:
A. 2x3=6 and 6x12=72 so 78 is greater than 36
6+72=79 which is less than 90
