In an agile approach of analytics, what is the first step of the process?
Perform data discovery
Perform business discovery
Score and deploy
Model data - Answer-Perform business discovery
In an ETL process, data is loaded into a final target database such as:
Operational dashboard
...
Predictive analytics may be applied to __________, which is a set of techniques that
use descriptive data and forecasts to identify the decisions most likely to result in the
best performance.
Costco wants to know how to stock their warehouses for a future pandemic and are
using current sales data to help them project the needs. Which kind of analytical
technique are they using?
Your professor is considering purchasing a self-driving car that can figure out the best
route and the optimum safe way to drive there without human intervention. What kind of
analytics is the car using to do this?
Which of the following question(s) can be better answered using data in order to reach
an evidence-based conclusion?
Who will win the NBA championship?
All of the answer selections are correct.
What is the purchase pattern(s) of our customers?
How many students will enroll for an online class in the Spring? - Answer-All of the
answer selections are correct.
Which of the following describes a positively skewed histogram?
a histogram for which mean and mode values are the same.
a histogram that has no fluctuation in mass
a histogram with large kurtosis
a histogram that tails off towards the right - Answer-a histogram that tails off towards the
right
, When two variables are highly positively correlated, the correlation coefficient will be
_______.
close to -1
close to 1
close to 10
close to 0 - Answer-close to 1
According to statistical notation, what does ∑ stand for?
to represent population measure
to represent sample statistics
to represent the number of items in a population
to act as a summation operator - Answer-to act as a summation operator
For a normal distribution mean is _______ to median.
not equal
greater than
less than
equal - Answer-equal
Which of the following is true for a median?
Median can be calculated no matter how the data is arranged
For an even number of observations, the median is the mean of the two middle
numbers
Medians are affected by outliers
A median is only meaningful for interval or ordinal data and not for ratio data - Answer-
For an even number of observations, the median is the mean of the two middle
numbers
Which of the following is an example of a measure of dispersion?
mode
mean
variance
median - Answer-variance
The difference between the first and third quartiles is referred to as the ____________.
standard deviation
interquartile range
midrange
variance - Answer-interquartile range
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