100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
QMB 3200 EXAM 1.docx $16.49
Add to cart

Exam (elaborations)

QMB 3200 EXAM 1.docx

 0 purchase
  • Course
  • QMB 3200
  • Institution
  • QMB 3200

frequency t distribution t - t correct t answer t - t shows t the t number t of t data t observations t that t fall t into t specific t intervals - t Graphically t summarize t information t not t readily t observable t by t merely t looking t at t data t in t a t table discrete t data t - t c...

[Show more]

Preview 4 out of 34  pages

  • December 27, 2024
  • 34
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • QMB 3200
  • QMB 3200
avatar-seller
edupearl
QMB 3200 EXAM 12024/2025 WITH 100% CORRECT
ANSWERS




frequency distribution - correct answer - shows the number of data observations that fall into specific intervals
t t t t t t t t t t t t t t t t




- Graphically summarize information not readily observable by merely looking at data in a table
t t t t t t t t t t t t t t




discrete data - correct answer - are values based on observations that can be counted and are typically
t t t t t t t t t t t t t t t t t t




represented by whole numbers t t t




- represent something that has been counted
t t t t t t




take on whole numbers such as 0, 1, 2, 3
t t t t t t t t t




continuous data - correct answer - are values that can take on any real numbers, including numbers that
t t t t t t t t t t t t t t t t t t




contain decimal points
t t




usually measured rather than counted
t t t t

,- Examples are weight, time, and distance
t t t t t t




examples of discrete data - correct answer Number of children per family
t t t t t t t t t t t




Number of cars listed per insurance policy t t t t t t




Vacation days per month t t t




example of continuous data - correct answer Time required to read chapter 2
t t t t t t t t t t t t




Thickness of paint applied to a car body t t t t t t t




Voltage of batteries produced in August t t t t t




relative frequency distribution - correct answer - display the proportion of observations of each class relative
t t t t t t t t t t t t t t t t




to the total number of observations
t t t t t




- shows the fraction of observations in each class
t t t t t t t t t




found by dividing each frequency by the total number of observations
t t t t t t t t t t




- the fractions in a relative frequency distribution add up to 1.00
t t t t t t t t t t t




cumulative relative frequency distribution - correct answer totals the proportion of observations that are less
t t t t t t t t t t t t t t t




than or equal to the class at which you are looking
t t t t t t t t t t




Shows the accumulated proportion as values vary from low to high
t t t t t t t t t t




histogram - correct answer is a graph showing the number of observations in each class of a frequency
t t t t t t t t t t t t t t t t t t




distribution

Excel uses the term "bins" for the classes in the distribution
t t t t t t t t t t




method to determine the number of classes in a frequency distribution is the rule - correct answer 2^k > or = n
t t t t t t t t t t t t t t t t t t t t t t

,k = Number of classes
t t t t




n = Number of data points
t t t t t




Find the lowest value of k that satisfies the rule
t t t t t t t t t




n = 50 t t




k=5 t t




k=6 t t




which is the better choice? - correct answer 25 = 32 < 50 (k = 5 is too small)
t t t t t t t t t t t t t t t t t t




26 = 64 > 50 (k = 6 is a good choice)
t t t t t t t t t t t




class width definition and formula - correct answer The width is the range of numbers to put into each class
t t t t t t t t t t t t t t t t t t t t




maximum data value - minimum date value / k t t t t t t t t




class boundaries - correct answer - represent the minimum and maximum values for each class
t t t t t t t t t t t t t t




- Choose class boundaries that are easy to read
t t t t t t t t




3 to less than 6 minutes
t t t t t t




6 to less than 9 minutes
t t t t t




9 to less than 12 minutes
t t t t t




3.21 to less than 6.21 minutes t t t t t




6.21 to less than 9.21 minutes t t t t t




9.21 to less than 12.21 minutes t t t t t




rules for classes of grouped data - correct answer *Equal-size classes.* All classes in the frequency distribution
t t t t t t t t t t t t t t t t t




must be of equal width t t t t




*Mutually exclusive classes.* Class boundaries cannot overlap t t t t t t

, *Include all data values.* Make sure all data values are accounted for in the total row of the frequency
t t t t t t t t t t t t t t t t t t t




distribution



*Avoid empty classes.* It is undesirable for a histogram to display a class so narrow that there are no
t t t t t t t t t t t t t t t t t t t




observations in it t t




*Avoid open-ended classes (if possible).* These violate the first rule of equal class sizes
t t t t t t t t t t t t t




qualitative data - correct answer - values that are categorical t t t t t t t t t




- Can be nominal or ordinal measurement level
t t t t t t t




- Describe a characteristic, such as gender or level of education
t t t t t t t t t t




Frequency distributions help display qualitative data by - correct answer - indicating the number of
t t t t t t t t t t t t t t t




occurrences of various categories t t t




- Can use Excel's COUNTIF function to count the number of values matching a category label
t t t t t t t t t t t t t t t




bar charts - correct answer are a good tool for displaying qualitative data that have been organized in categories
t t t t t t t t t t t t t t t t t t




pareto charts - correct answer are bar charts that show the frequency of the categories that cause quality
t t t t t t t t t t t t t t t t t t




control problems t t




Show quality problem categories in decreasing order
t t t t t t




The most problematic categories are shown first
t t t t t t t




Pareto charts also plot the cumulative relative frequency as a line on the chart known as an *ogive*
t t t t t t t t t t t t t t t t t




pie charts - correct answer - are another excellent tool for comparing proportions for categorical data
t t t t t t t t t t t t t t t

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 or Stuvia-credit 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 edupearl. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $16.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

77071 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 15 years now

Start selling
$16.49
  • (0)
Add to cart
Added