WPC 300 EXAM QUESTIONS WITH ALL CORRECT ANSWERS
When a person manipulates one factor and observes its effect on another factor, this is - Answer- an experiment
When two variables are highly positively correlated, the correlation coefficient will be - Answer- close to 1
100 bottles of wate...
When a person manipulates one factor and observes its effect on another factor, this is
- Answer- an experiment
When two variables are highly positively correlated, the correlation coefficient will be -
Answer- close to 1
100 bottles of water were randomly selected from a large collection of bottles in a
company's warehouse. the 100 bottles are referred to as the - Answer- sample
Which is true of A/B testing - Answer- it compares two versions of the website to see
which one performs better
what is a dependent variable in an experiment - Answer- A factor that responds to
change made to other factors
_______ is a measure of linear association between two variables X and Y, which does
not depend of the units of measurement. - Answer- Correlation
which of the following is not a measure of data spread? - Answer- Kurtosis
Kurtosis for a perfectly normal distribution is - Answer- 0
A ______________ is a relationship between two variables that appear to have
interdependence or association with each other but actually do not. - Answer- Spurious
correlation
In the planning phase of an experiment, you have to decide on the - Answer-
More people who have cancer are depressed than those who do not have cancer. Thus,
we conclude that depression is the cause of cancer. Which of the following statements
is correct? - Answer- There are confounding variables
An experiment is said to be double-blinded if - Answer- Subjects and those working with
the subjects are not aware of who given which treatment
ETL stands for - Answer- Extract, Transform, and Load
Which of the following is true in Heuristics - Answer- We rely on common sense
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