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What are the th ree principles of describing data? C Dispersion, range and standard deviation center, spread and shape Mean, median and mode C Centrality, dispersion and size de Question 2 2 pts What is the first step of running an A/B testing? Establishing the conversion rate Making assumptions about your customer behavior nt Creating three variations for your landing page elements Establishing your success metric Question 3 2 pts In the experimental design example "IQ Water", students are called C Response variable Treatments Experimental units Measurement units 2 Amy Symonds, Yuchen Zhang tvana Pond, D Standard deviation of a normal data distribution is a C Measure of data centrality C Measure of data shape Measure of data dispersion C Measure of data quality Question 5 2 pts For a normal distribution mean is to median. C Greater than Less than Exactly equal Closely equal 2 pts Question 6 When two variables are highly positively correlated, the correlation coefficient will be Close to 10 Close to 1 Close to 0 2 Question 7 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? C Weight C Exercise level Time of exercise C Age Question 8 2 pts Which of the following is true about A/B testing? C A neutral result on an AB testing means you correctly performed the test You need to attend WPC 300 course to learn about A/B Testing You should test mutiple elements of your landing page at a time and compare To increase conversion rate of your website traffic, A/B testing can be beneficial. Question 9 2 pts In inferential statistics, a is used to infer about a sample, population Question 9 2 pts In inferential statistics, a is used to infer about a rample, population C Population, significance C Population, sample Sample, significance Question 10 2 pts Bessel correction is applied to O Sample data Population covariance Population variance C Sample covariance

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