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Elementary Statistics (STATs 2023) Final_Review_Exam_2 with 100% Correct answers $14.99   Add to cart

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Elementary Statistics (STATs 2023) Final_Review_Exam_2 with 100% Correct answers

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Elementary Statistics (STATs 2023)

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  • September 7, 2024
  • 23
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
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Determine the Point Estimate for a Population Proportion
Question 1 0..333333333 points

Determine the point estimate.


A survey of 500 likely voters showed that 385 felt that the economy was the most important national issue.

Find a point estimate (p-hat) for p, the population proportion of voters who feel the economy is the most
important national issue.

Question options:


385


1.30


0.77


0.08

Identify the Point Estimate from a Confidence Interval
Question 2 0..333333333 points

Determine the margin of error.

It has been determined with 95% confidence that the proportion of Americans who eat turkey on Thanksgiving
is between 0.78 and 0.82.

Determine the margin of error associated with this confidence interval.

Question options:


±0.95

±0.0
4

±0.1

, 0

±0.0
2

±0.0
5
Identify the Margin of Error from a Confidence Interval
Question 3 0..333333333 points

Determine the point estimate.

It has been determined with 95% confidence that the proportion of Americans who eat turkey on Thanksgiving
is between 0.78 and 0.82.

Determine the sample proportion that was used to build this confidence interval.

Question options:


0.95


0.80


0.05


0.82


0.78

Constructing a Confidence Interval given a Point Estimate and Margin of Error
Question 4 0..333333333 points

Determine the specified confidence interval.

An article estimates, with 90% confidence, that the proportion of elementary school teachers who are female is
82%. The article also specifies a margin of error equal to 0.03.

Determine the resulting 90% confidence interval for the proportion of elementary school teachers who are
female.

, Question options:


(0.82 , 0.85)


(0.79 , 0.85)


(0.805 , 0.835)


(0.79 , 0.82)


(0.87 , 0.93)

Constructing a Confidence Interval for a Mean given S
Question 5 0..333333333 points

Construct the requested confidence interval.

A meteorologist was interested in the average speed of a thunderstorm in his area. He sampled 13 thunderstorms
and found that the average speed at which they traveled across the area was 15 miles per hour with a sample
standard deviation of 1.7 miles per hour.

Assuming the speed of a thunderstorm is approximately normal, construct a 99% confidence interval for the
true average speed of a thunderstorm in his area.

Question options:


(10.6, 19.4)


(13.8, 16.2)


(13.6, 16.4)


(5.2, 24.8)


(14.2, 15.8)

Constructing a Confidence Interval for a Proportion
Question 6 0..333333333 points

Construct the requested confidence interval.

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