Answer:
The answer to your question is:th first option is correct.
Step-by-step explanation:
Here we have and hyperbola with center (0, 1), and the hyperbola is horizontal because x² is positive.
Equation
y - k = ±
Process
Find a, b
a² = 9
a = 3
b² = 5
b = √5
h = 0 and k = 1
Substitution
y - 1 = ±
Equation 1
y =
Equation 2
y = -
Answer:
The best option would be:
d. 0.1465
Step-by-step explanation:
Previous concepts
A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".
The margin of error is the range of values below and above the sample statistic in a confidence interval.
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
represent the real population proportion for brand 18-25 users
represent the estimated proportion for 18-25 users
is the sample size
represent the real population proportion for 26-35 users
represent the estimated proportion for 26-35 users
is the sample size required for Brand B
represent the critical value for the margin of error
The population proportion have the following distribution
Solution to the problem
The confidence interval for the difference of two proportions would be given by this formula
For the 99% confidence interval the value of and
, with that value we can find the quantile required for the interval in the normal standard distribution.
And the margin of error is given by:
And if we replace we got:
The best option would be:
d. 0.1465