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Answer:
B) The margin of error is 0.0269.
C) The confidence interval is (0.5406, 0.5944).
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 .
The margin of error is:
In the poll, n=918 and x=521 who said "yes."
This means that
90% confidence level
So , z is the value of Z that has a pvalue of
, so
.
B) Identify the value of the margin of error E.
The margin of error is 0.0269.
C) construct the confidence interval.
So
The confidence interval is (0.5406, 0.5944).
For this case we have that the variable "k" represents the floor area of Melanie's kitchen.
We have that the floor area of the room is 1.5 times the floor area of the kitchen, then, we propose the following function to find the floor area of the room:
Answer:
Option A and D
Answer:
The 90% confidence level is
Step-by-step explanation:
From the question we are told that
The sample size is
The mean age is
The standard deviation is
Generally the degree of freedom for this data set is mathematically represented as
substituting values
Given that the level of confidence is 90% the significance level is mathematically evaluated as
10 %
Now
Since we are considering a on tail experiment
The critical value for half of this significance level at the calculated degree of freedom is obtained from the critical value table as
The margin for error is mathematically represented as
substituting values
he 90% confidence interval for the true average age of all students in the university is evaluated as follows
substituting values