Answer:
a) 0.23
b) The 95% confidence interval for the population proportion is (0.1717, 0.2883).
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 
.
Point estimate
The point estimate is:
95% confidence level
So 
, z is the value of Z that has a pvalue of 
, so 
.
The lower limit of this interval is:
The upper limit of this interval is:
The 95% confidence interval for the population proportion is (0.1717, 0.2883).
I can help you in spanish
Answer: the first is direct and the second is inverse.
Step-by-step explanation: There is no variation in the Y axis on the first, but there is lots of variation in the second
explanation - take the biggest number in the data set, and subtract the smallest number from the data set. that is your range
4x+6<-6
minus6 both sides
4x<-12
divide 4 both sides
x<-3
x is any number less than -3
try -100
4(-100)+6<-6
-400+6<-6
-394<-6
true
x<-3
