Answer:
The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.
Step-by-step explanation:
Margin of error

In which
is the standard deviation and n is the size of the sample.
Standard deviation of 1.3
This means that 
She surveys 124 families
This means that 
Margin of error and meaning:



The margin of error is of 0.3012, and it means that we should be 99% confident that the population mean would be within 0.3012 of the sample mean.
Answer:
1. 11:16
2. 13:14
3. 13:4
4. 2:23
5. 5:3
6. 8:13
Step-by-step explanation:
Some answers are reduced to the point that prime numbers can't be reduced, hopefully this helps ^^
Answer:
6x - 4x
Step-by-step explanation: