Attempt 1
Written: Jun 14, 2019 7:01 AM - Jun 14, 2019 9:59 AM
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Question 1 2..5 points
In a poll of 400 voters in a certain state, 61% said that they opposed a voter ID bill that might
hinder some legitimate voters from voting. The margin of error in the poll was reported as 4
percentage points (with a 95% degree of confidence). Which statement is correct?
Question options:
a) The reported margin of error is consistent with the sample size.
There’s not enough information to determine whether the margin of error is
b)
consistent with the sample size.
c) The sample size is too small to achieve the stated margin of error.
d) For the given sample size, the margin of error should be smaller than stated.
Questio
2..5 points
n2
Among a random sample of 500 college students, the mean number of hours worked per
week at non-college-related jobs is 14.6. This mean lies 0.4 standard deviations below the
mean of the sampling distribution. If a second sample of 500 students is selected, what is the
probability that for the second sample, the mean number of hours worked will be less than
14.6?
Question options:
a) 0.5
b) 0.6179
c) 0.6554
0.3446
d)
, Questio
2..5 points
n3
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll
of 490 college students showed that 33% of them had, or intended to, cheat on examinations.
Find the margin of error for the 95% confidence interval.
Question options:
a) 0.043
b) 0.0434
c) 0.0425
d) 0.0427
Questio
2..5 points
n4
A researcher wishes to estimate the mean amount of money spent per month on food by
households in a certain neighborhood. She desires a margin of error of $30. Past studies
suggest that a population standard deviation of $248 is reasonable. Estimate the minimum
sample size needed to estimate the population mean with the stated accuracy.
Question options:
a) 274
b) 284
c) 264
d) 272
Questio
2..5 points
n5
, Write possible coordinates for the single outlier such that it would no longer be an outlier.
Question options:
a) (23, 18)
b) (20, 5)
c) (15, 15)
d) (12, 15)
Questio
.5 points
n6
Which line of the three shown in the scatter diagram below fits the data best?
Question options:
a) A
b) B
c) C
All the lines are equally good.
d)
Written: Jun 14, 2019 7:01 AM - Jun 14, 2019 9:59 AM
Submission View
Your quiz has been submitted successfully.
Question 1 2..5 points
In a poll of 400 voters in a certain state, 61% said that they opposed a voter ID bill that might
hinder some legitimate voters from voting. The margin of error in the poll was reported as 4
percentage points (with a 95% degree of confidence). Which statement is correct?
Question options:
a) The reported margin of error is consistent with the sample size.
There’s not enough information to determine whether the margin of error is
b)
consistent with the sample size.
c) The sample size is too small to achieve the stated margin of error.
d) For the given sample size, the margin of error should be smaller than stated.
Questio
2..5 points
n2
Among a random sample of 500 college students, the mean number of hours worked per
week at non-college-related jobs is 14.6. This mean lies 0.4 standard deviations below the
mean of the sampling distribution. If a second sample of 500 students is selected, what is the
probability that for the second sample, the mean number of hours worked will be less than
14.6?
Question options:
a) 0.5
b) 0.6179
c) 0.6554
0.3446
d)
, Questio
2..5 points
n3
A researcher wishes to estimate the proportion of college students who cheat on exams. A poll
of 490 college students showed that 33% of them had, or intended to, cheat on examinations.
Find the margin of error for the 95% confidence interval.
Question options:
a) 0.043
b) 0.0434
c) 0.0425
d) 0.0427
Questio
2..5 points
n4
A researcher wishes to estimate the mean amount of money spent per month on food by
households in a certain neighborhood. She desires a margin of error of $30. Past studies
suggest that a population standard deviation of $248 is reasonable. Estimate the minimum
sample size needed to estimate the population mean with the stated accuracy.
Question options:
a) 274
b) 284
c) 264
d) 272
Questio
2..5 points
n5
, Write possible coordinates for the single outlier such that it would no longer be an outlier.
Question options:
a) (23, 18)
b) (20, 5)
c) (15, 15)
d) (12, 15)
Questio
.5 points
n6
Which line of the three shown in the scatter diagram below fits the data best?
Question options:
a) A
b) B
c) C
All the lines are equally good.
d)
