1200 divided by 5 is 240 so each month she pays $240
X = 89
Used the Pythagorean theorem (a squared plus b squared equals c squared)
Answer: (94.08, 101.92)
Step-by-step explanation:
The confidence interval for unknown population mean is given by :-
, where = Sample mean
= Population standard deviation
z* = Critical z-value.
Given : A random variable x has a Normal distribution with an unknown mean and a standard deviation of 12.
n= 36
Confidence interval = 95%
We know that the critical value for 95% Confidence interval : z*=1.96
Then, the 95% confidence interval for the mean of x will be :-
Hence, the 95% confidence interval for the mean of x is (94.08, 101.92) .
Answer:
ASA
Step-by-step explanation:
Because I need trust in my life
Answer:
The reasonable range for the population mean is (61%, 75%).
Step-by-step explanation:
The interval estimate of a population parameter is an interval of values that consist of the values within which the true value of the parameter lies with a certain probability.
The mean of the sampling distribution of sample proportion is, .
One of the best interval estimate of population proportion is the 95% confidence interval for proportion,
Given:
n = 150
= 0.68
The critical value of <em>z</em> for 95% confidence level is:
Compute the 95% confidence interval for proportion as follows:
Thus, the reasonable range for the population mean is (61%, 75%).