1. To evaluate the effectiveness of two website interfaces, a firm showed 50 of the people who came to website interface A, and the next 50 people the website interface B. The firm tracks the time that people stay on the website in seconds. Next, the analyst conducts a t-test. Which procedure is incorrect?

T-test is not appropriate for this research.

Visitors are not randomly assigned

Time of staying on the website is not an appropriate variable to be collected

None of the procedures is incorrect

2.A firm wanted to conduct a K-means clustering analysis to segment its customers based on customers income and age. Analysts collected customers' information on age and income from the firm's data warehouse. Next, they determined to create 4 segments and conducted the analysis using Tableau. Which procedure is missing?

Random assignment of customers

Using other softwares to conduct the k-means analysis

Scale the age and the income

No procedure is missing

3.Please scale the following variable Xi: Xi=22, Xmean=10, Standard Deviation=

4 What is the scaled Xi? 4. To determine if banner advertisement A is significantly higher than the banner advertisement B in the number of clicks, the marketing analyst should use

one-tail t-test
		two-tail t-test
		z-test
		clustering analysis