100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Stats chapter 2 practice test £6.15   Add to cart

Exam (elaborations)

Stats chapter 2 practice test

 1 view  0 purchase

Stats chapter 2 practice test

Preview 1 out of 2  pages

  • June 18, 2024
  • 2
  • 2023/2024
  • Exam (elaborations)
  • Questions & answers
All documents for this subject (51)
avatar-seller
modockochieng06
Stats chapter 2 practice test
If one wanted to calculate summary statistics for salaries at a large company where there
are many people with modest salaries and a few with very high salaries, which would be the
most appropriate measures of center and spread?

a. median and IQR
b. Mean and IQR
c. Mode and Range
d. Mean and Standard Deviation - correct answer-a

Mr. Jones' class of 32 students had a mean score of 72.4% while Mr. Roberts' class of 29
students had a mean score of 63.4%. What is the mean score of these two classes?

a. 63%
b. 67.5%
c. 67.9%
d. 68.1
e. 72.4% - correct answer-d

After the times were calculated at a recent cross-country race, it was discovered that the
timers started their watches 3 minutes after the gun was shot for the start. If the mean time
for the runners was 21.2 minutes and the standard deviation was 2.1 minutes, what would
the new measurements be after adjusting the times?

a. cannot be determined without knowing how many runners there were
b. mean = 21.2, S = 5.1
c. mean = 24.2, S = 5.1
d. mean = 24.2, S = 2.1
e. mean = 21.2, S = 2.1 - correct answer-d

Given the five-number summary: What would the upper boundary be (to the nearest
hundredth)?

min 12 Q1 17.5 median 24 Q3 30 max 40 - correct answer-48.75

A set of data was submitted to a calculator and here are the summary statistics: Which is a
correct description of this data?
mean = 72.4
std dev = 2.8
median = 66.4

a. the data is symmetrical with no apparent outliers
b. The data is skewed left
c. The data is linear with a positive trend
d. The data is skewed right - correct answer-d

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

Quick and easy check-out

You can quickly pay through credit card for the summaries. There is no membership needed.

Focus on what matters

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 modockochieng06. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for £6.15. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

77851 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now

Start selling
£6.15
  • (0)
  Add to cart