Exam (elaborations)
Post Test. Data and Sampling Questions and Answers 2024
- Course
- Institution
Post Test. Data and Sampling
[Show more]
Content preview
Post Test. Data and SamplingWhich statement is true? - answerTo calculate a point estimate, we need to know the
sample size.
The table gives a car dealer's weekly sales for a random sample of 26 weeks. The
sample mean of cars sold per week is - answer5
A school supervisor wants to determine the percentage of students that bring their lunch
to school.
Which of the following methods would assure random selection of a sample population?
- answerThe supervisor should randomly select students from all grade levels taught at
the school.
A restaurant owner wants to determine the effectiveness of his servers. The owner
places a survey regarding the servers' effectiveness with randomly selected customer
bills.
What is the sample? - answerThe sample is the randomly selected customers.
Members of a student council are designing a school float for a parade. They decide to
poll 10% of the student body to get feedback about the theme they have chosen.
What would most likely happen if they decided to randomly sample 5% of the student
body instead? - answerThe sample proportion would less closely model the population
proportion.
A company manufactures 2,000 units of its flagship product in a day. The quality control
department takes a random sample of 40 units to test for quality. The product is put
through a wear-and-tear test to determine the number of days it can last. If the product
has a lifespan of less than 26 days, it is considered defective. The table gives the
sample data that a quality control manager collected. - answerThe point estimate of the
population mean is 32.3 , and the point estimate of the proportion of defective units is
0.5 .
Students in a reading class have three options for their book project: making a
brochure, writing a news article, or designing a computer presentation.
From past years, the teacher has determined that 20% of students usually choose to
make a brochure, 30% of students usually choose to write a news article, and the
remaining students usually choose to design a computer presentation.
If the teacher uses 20 colored chips in three different colors to model this situation, how
many colored chips should she use to represent each book project option?
making a brochure: ______ blue chips
writing a news article: ______ yellow ships
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 julianah420. 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)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now