Exam (elaborations)
Elementary Statistics (STATs 2023) module 4 Practice test
- Course
- Elementary Statistics
- Institution
- St. Petersburg College
Elementary Statistics (STATs 2023)
[Show more]
Content preview
Module 4 TestSelect the most appropriate response.
_____ 1. The purpose of statistical inference is to provide information about the:
a) sample based upon information obtained from the population
b) population based upon information obtained from a sample
Determine the point estimate.
_____ 2. A survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone. Determine a
point estimate for p, the population proportion of non-fatal accidents that involved the use of a cell
phone.
a) 0.527
b) 0.896
c) 0.473
d) 0.321
Construct the requested confidence interval.
_____ 3. A media poll of 500 air travelers surveyed in national airports found that 370 favor tighter security
procedures in boarding planes. Construct a 90% confidence interval for the proportion of all air
travelers who are in favor of tighter security procedures.
( .74 ) (.26)
a) .74 ± 1.645
√ 500
( .5 ) (.5)
b) .74 ± 1.645
√ 500
( .74 ) (.26)
c) .74 ± 1.96
√ 500
( 370 )( 130)
d) 370 ±1.645
√ 500
Determine the margin of error.
_____ 4. It has been determined with 95% confidence that the proportion of on-line students at SPC who live
in Pinellas County is between 0.73 and 0.77.
Determine the margin of error associated with this confidence interval.
a) ±0.01
b) ±0.02
This study source was downloaded by 100000880779952 from CourseHero.com on 09-05-2024 12:55:33 GMT -05:00
https://www.coursehero.com/file/57838657/Module-4-Test-docx/
, c) ±0.03
d) ±0.04
e) ±0.05
Determine the sample proportion.
____ 5. It has been determined with 95% confidence that the proportion of on-line students at SPC who live
in Pinellas County is between 0.73 and 0.77.
Determine the sample proportion of on-line SPC students who live in Pinellas County.
a) 0.10
b) 0.73
c) 0.75
d) 0.79
e) 0.90
Construct the requested confidence interval.
_____ 6. A survey of 280 homeless persons showed that 63 were veterans. Construct a 90% confidence interval
for the proportion of homeless persons who are veterans.
a) (0.161, 0.289)
b) (0.184, 0.266)
c) (0.176, 0.274)
d) (0.167, 0.283)
Determine the confidence level.
_____ 7. Determine the confidence level for confidence interval shown in the figure below.
This study source was downloaded by 100000880779952 from CourseHero.com on 09-05-2024 12:55:33 GMT -05:00
https://www.coursehero.com/file/57838657/Module-4-Test-docx/
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller YourAssignmentHandlers. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
62890 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now