Answer:
The margin of of error for a 95% confidence interval for the population mean is of 1.39 years.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.96.
The margin of error is:
In which 
is the standard deviation of the population and n is the size of the sample.
Population standard deviation of 3 years
This means that 
Sample of 18 voters
This means that 
Margin of error:
The margin of of error for a 95% confidence interval for the population mean is of 1.39 years.
The best answer is "We can expect 135 of the grandparents to spend less than 2 hours a day online" because about 54% of all people said they spend >2 hours online everyday, and 54% of 250 is 135.
Hope this helps!
If she has 20 dollars and her mom gives her 5 more that would be 25 dollars.
<span>if each gift cost 5 dollars then you would divide 25 by 5 which would come out to 5 gifts. </span>
Answer:160
Step-by-step explanation:
10 x 16
Answer:
Yurrrrrrrrrrrrrrrrrrrrrrr
Step-by-step explanation:
Who got the answer to the homework
