Exam (elaborations)
MSIS 3223 Exam 2 Content|84 Questions & Answers
- Course
- Institution
MSIS 3223 Exam 2 Content|84 Questions & Answers
[Show more]
Content preview
MSIS 3223 Exam 2 Content|84Questions & Answers
Conditional probability is the probability of occurrence of one event 'A' given
that another event 'B' is known to be true or already occurred. - -True
- Which of the following is true of normal distributions? - -The mean,
median, and mode are all equal.
- Probability is the likelihood that an outcome occurs. - -True
- The union of two events contains all outcomes that belong to either of the
two events. - -True
- Conditional probability is the probability of occurrence of one event 'A'
given that another event 'B' is known to be true or has already occurred. - -
True
- A probability distribution is the characterization of the possible values that
a random variable may assume along with the probability of assuming these
values. - -True
- A random variable is a numerical description of the outcome of an
experiment. - -True
- The expected value of a random variable corresponds to the notion of the
median for a sample. - -False
- The normal distribution is a continuous distribution that is described by the
familiar bell-shaped curve and is perhaps the most important distribution
used in statistics. - -True
- The triangular distribution is defined by three parameters: the mean,
median, and mode. - -False
- Higher variance implies low uncertainty. - -False
- Variance calculates the probability of a random variable lying within a
certain interval. - -True
- Regression models of ______ data focus on predicting the future. - -time-
series
, - Regression analysis is a tool for building mathematical and statistical
models that characterize relationships between a dependent variable and
one or more independent, or explanatory, variables. - -True
- In predictive analysis models, a second-order polynomial has only one hill
or valley. - -True
- Excel's Trendline feature cannot be used in modeling trends which include
time variables.
Group of answer choices - -False
- Creating a scatter chart with an added trendline is visually superior to the
scatter chart
generated by line fit plots. - -True
- The standard error may be assumed to be large if the data are clustered
close to the regression line. - -False
- A good regression model has the fewest number of explanatory variables
providing an adequate interpretation of the dependent variable. - -True
- Regression analysis is a tool for building mathematical and statistical
models that characterize relationships between a dependent variable and
one or more independent, or explanatory, variables. - -True
- Simple linear regression involves finding a linear relationship between one
independent variable, X, and one dependent variable, Y. - -True
- Standard residuals (observed errors) are residuals divided by their
standard deviation. - -True
- Linear functions are used when the rate of change in a variable increases
or decreases quickly and then levels out, such as with diminishing returns to
scale. - -False
- Exponential functions have the property that y rises or falls at constantly
increasing rates. - -True
- Exponential function - -y+abx
- Logarithmic Functions - -are used when the rate of change in a variable
increases or decreases quickly and then levels out, such as with diminishing
returns to scale. y=ln(x)
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 Nursephil2023. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82191 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now