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(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

 

 



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Expert Answer


 

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

 

 

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