(Solved): WPC300 Quiz 2...

WPC300 QUIZ 2

Score for this attempt: 20 out of 20

Question 1

2 / 2 pts

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

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

 Question 2

2 / 2 pts

What are the three principles of describing data?

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

 Question 3

2 / 2 pts

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

•   Treatments
•    Experimental units
•    Measurement units
•    Response variable

 Question 4

2 / 2 pts

Standard deviation of a normal data distribution is a ___________________

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

 Question 5

2 / 2 pts

For a normal distribution mean is _____________  median.

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

 Question 6

2 / 2 pts

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

•   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
•    To increase conversion rate of your website traffic, A/B testing can be beneficial.
•    You need to attend WPC 300 course to learn about A/B Testing

 Question 7

2 / 2 pts

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

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

 Question 8

2 / 2 pts

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?

•   Weight
•    Age
•   Exercise level
•    Time of exercise

 Question 9

2 / 2 pts

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

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

 Question 10

2 / 2 pts

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