Answer:
(a)
(b)
(c)
Step-by-step explanation:
Solving (a):
Take LCM
Multiply through by 20
Solve for x
Solving (b):
This gives:
Solve for x
Solving (c):
Multiply both sides by
Answer:
Great
Step-by-step explanation:
However, you're missing a factor of 9.
Answer:
y^-1= x +8
Step-by-step explanation:
this may be helpful for you
Answer:
The 99% confidence interval for the proportion of the population who are obese is (0.25, 0.282)
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:
99% 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 99% confidence interval for the proportion of the population who are obese is (0.25, 0.282)