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Homework answers / question archive / Question 1 0 / 2 pts The best estimate for a population proportion is the value of p ^ True False Question 2 2 / 2 pts For a confidence level of 95%, the postive value for z α 2is 2
Question 1
0 / 2 pts
The best estimate for a population proportion is the value of p ^
True
False
2 / 2 pts
For a confidence level of 95%, the postive value for z α 2is
2.575
1.96
2.05
2.33
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The margin of error E is
0.020
.560
.040
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The value of p ^is
.560
.040
.060
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The best estimate of the number of items in the sample n is
Cannot be determiend
3345
1200
2000
2 / 2 pts
Suppose that a random sample of 1500 adults revealed that 954 of them had attended some college.
If we construct the 95% confidence level for the proportion of all adults then we have:
.604 < p< .668
.612<p < .660
.610< p < .658
2 / 2 pts
Given the sample data below
x ¯ = 35.6 ; s = 6.2 ; n = 20
Then the 90% confidence interval for μ
(assuming a normal population ) is
31.6< μ< 39.6
33.2 < μ< 38.0
32.7< μ< 38.5
2 / 2 pts
Suppose that a n = 21 and that α = 0.05.
Then the positive value of value of t α / 2
would be
2.086
2.080
1.721
2 / 2 pts
Given a 95% confidence interval for μ:
100< μ< 200, then
x ¯ and E would be
150 and 350 respectively
100 and 20 respectively
150 and 50 respectively
2 / 2 pts
Given a 90% confidence interval for the population standard deviation,
If n = 26 then the critical values χ L 2and
χ R 2are
13.120 and 40.646
14.611 and 37.652
16.151 and 40.113
Question 1
0 / 2 pts
The best estimate for a population proportion is the value of p ^
Correct answer
True
You Answered
False
2 / 2 pts
For a confidence level of 95%, the postive value for z α 2is
2.575
Correct!
1.96
2.05
2.33
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The margin of error E is
Correct!
0.020
.560
.040
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The value of p ^is
Correct!
.560
.040
.060
2 / 2 pts
Given the 98% confidence interval for p:
0.540 < p < 0.580
The best estimate of the number of items in the sample n is
Cannot be determiend
Correct!
3345
1200
2000
2 / 2 pts
Suppose that a random sample of 1500 adults revealed that 954 of them had attended some college.
If we construct the 95% confidence level for the proportion of all adults then we have:
.604 < p< .668
Correct!
.612<p < .660
.610< p < .658
2 / 2 pts
Given the sample data below
x ¯ = 35.6 ; s = 6.2 ; n = 20
Then the 90% confidence interval for μ
(assuming a normal population ) is
31.6< μ< 39.6
Correct!
33.2 < μ< 38.0
32.7< μ< 38.5
2 / 2 pts
Suppose that a n = 21 and that α = 0.05.
Then the positive value of value of t α / 2
would be
Correct!
2.086
2.080
1.721
2 / 2 pts
Given a 95% confidence interval for μ:
100< μ< 200, then
x ¯ and E would be
150 and 350 respectively
100 and 20 respectively
Correct!
150 and 50 respectively
2 / 2 pts
Given a 90% confidence interval for the population standard deviation,
If n = 26 then the critical values χ L 2and
χ R 2are
13.120 and 40.646
Correct!
14.611 and 37.652
16.151 and 40.113