(Solved): WPC 300 - Quiz 2 Questions...

Question 1

Standard deviation of a normal data distribution is a ___________________

•   Measure of data quality 
•   Measure of data centrality 
•   Measure of data shape 
•   Measure of data dispersion

Question 2

Which of the following is true about A/B testing?

•   To increase conversion rate of your website traffic, A/B testing can be beneficial.
•   You should test multiple elements of your landing page at a time and compare
•   A neutral result on an A/B testing means you correctly performed the test
•    You need to attend WPC 300 course to learn about A/B Testing

Question 3

In the experimental design example "IQ Water", students are called  

•   Experimental units 
•   Treatments 
•   Measurement units 
•   Response variable 

Question 4

A researcher wants to find out if lack of exercise leads to weight gain. Which of the following variables could be considered as a confounder?  

•   Time of exercise
•   Age 
•   Exercise level 
•   Weight

Question 5

In inferential statistics, a _____________ is used to infer about a ______________.

•   Population, sample
•  Sample, population
•   Sample, significance
•   Population, significance 

Question 6

Regular consumptions of organic food will keep you in a good mood. In this example, the confounder could be  

•   Money
•  organic food
•   people's mood
•  work ethics

Question 7

What are the three principles of describing data?

•   center, spread and shape
•   Centrality, dispersion and size
•   Dispersion, range and standard deviation
•   Mean, median and mode

Question 8

For a normal distribution mean is _____________  median.

•   sometime equal to
•   Greater than
• Less than
•  Closely equal to

Question 9

When two variables are highly positively correlated, the correlation coefficient will be ______________

•   Close to 0
•  Close to -1
•   Close to 1
•  Close to 10

Question 10

What is the first step of running an A/B testing to improve website visits?

Hint: What do you do in any experimental design, in this case, design for A/B testing?

•   Making assumptions about the behavior of the visitors to the site
•   Establishing your success metric to improve site visits
•   Establishing the conversion rate from the site visit
•   Creating three variations for your landing page elements