Our experience with students bringing cell phones and entertainment systems to school has been that too often they go missing (lost or stolen) either in school or on the bus. This creates many issues regarding questioning students and investigating incidents. We feel it is the safest policy for students not to have them in school. As our sites are small, everyone has the ability to make and receive calls to their parents in an emergency. We also feel it can lead to miscommunication if students are being communicated to directly and administration or staff is not also informed.
This should be good
Answer:
The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549
Step-by-step explanation:
In a sample with a number n of people surveyed with a probability of a success of 
, and a confidence level of 
, we have the following confidence interval of proportions.
In which
z is the zscore that has a pvalue of 
.
For this problem, we have that:
90% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The lower limit of this interval is:
The lower bound for a 90% confidence interval for the percentage of all American adults who believe in ghosts is 0.3549
15% because 420/2800=.15 and that number converted into a percentage is 15%
Pretty sure the answer is D:
Because the equation is in the format y=mx+c (c being the y intercept), we know that the y intercept (or where the line will cross the y axis) will be -9.
B also says -9 but we have to be careful because it states that the x axis is -9 rather than the y axis.
Hope that helped you understand.
