Exam (elaborations)
BSNS112 Exam 2024 | BSNS 112 Actual Exam 2024 Questions and Correct Answers Rated A+
- Course
- Institution
BSNS112 Exam 2024 | BSNS 112 Actual Exam 2024 Questions and Correct Answers Rated A+
[Show more]
Seller
Follow
paulynmugo
Reviews received
Content preview
BSNS112 Exam 2024 | BSNS 112 ActualExam 2024 Questions and Correct
Answers Rated A+
What does quantitative data use? -ANSWER-Means
What is discrete data? -ANSWER-Quantitative. Measured in specific values
What is continuous data? -ANSWER-Quantitative. Measure in infinite
values
What does qualitative data use? -ANSWER-Proportions
What is ordinal data? -ANSWER-Qualitative. Conveys a ranking
What is nominal data? -ANSWER-Qualitative. Uses labels (no ranking)
What variables does a cross tabulation table use? -ANSWER-Categorical
and categorical
What variables does a scatter plot use? -ANSWER-Numerical and
numerical
What variable(s) does a frequency table use? -ANSWER-One categorical
variable
What variables does a stacked/clustered bar chart use? -ANSWER-
Categorical and categorical
What variables does a relative frequency histogram use? -ANSWER-
Categorical and numerical
Define mean -ANSWER-Simple average
,Define median -ANSWER-Middle value when data is ranked
Define mode -ANSWER-Most frequent value
Define trimmed mean -ANSWER-Average when most extreme 5% of data
is cut
Define range -ANSWER-maximum - minimum
Define interquartile range -ANSWER-75th percentile - 25th percentile
Define variance -ANSWER-spread of data around mean (σ²)
What happens when standard deviation increases? -ANSWER-Graph
widens
Define coefficient of variation -ANSWER-Compares variability between
groups with different magnitudes
Coefficient of variation equation -ANSWER-SD / x̅ where x̅ is the sample
mean
What does it mean by a positively skewed graph? -ANSWER-Tail trails to
the right. Mean > Median > Mode
What does it mean by a negative skewed graph? -ANSWER-Tail trails to
the left. Mode > Median > Mean
When is a graph significantly skewed? -ANSWER-Skewness more than
twice the standard error
Define kurtosis -ANSWER-Measure of the extent to which observations
cluster around a central point
, What is the normal distribution kurtosis value? -ANSWER-0
Define positive kurtosis -ANSWER-Data clusters more in the centre
Define negative kurtosis -ANSWER-Data clusters less in the centre
How is cross-sectional data collected? -ANSWER-By observing many
subjects at the same point of time, or without regard to differences in time
What is time-series data? -ANSWER-A sequence taken at successive
equally spaced points in time (discrete-time data)
Define association -ANSWER-How one variable relates to another
Define covariance -ANSWER-Measure of the co-movement between 2
variables (measured in units)
Define positive covariance -ANSWER-2 variables move in the same
direction
Define negative covariance -ANSWER-2 variables move in the opposite
direction
Define the correlation coefficient -ANSWER-Measure of the linear
relationship between 2 variables (scaled to equal a value between -1 and
+1)
Define positive correlation -ANSWER-2 variables move in the same linear
direction
Define negative correlation -ANSWER-2 variables move in the opposite
linear direction
Define parameter -ANSWER-A summary measure that describes a
characteristic of the population
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 paulynmugo. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $23.08. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75759 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now