Question 6 2 pts A usability study compares the number of page visits on a web site. Half of the participants saw Version A of the home page. The other half of the participants saw Version B of the home page. In this study, the version of the home page is considered: A dependent variable An independent variable Ordinal data A web analytic Previous Next Natisaved Submit Question 7 2 pts In a usability study of a web site, each participant was asked to rate each task as Very Easy, Somewhat Easy, Somewhat Difficult, or Very Difficult. Use of these ratings provides: Oratio data interval data ordinal data nominal data Previous Next Not saved Submit Quiz Question 8 2 pts A usability test measures the time to complete a task for 10 participants. The times in seconds) were: 116, 68, 99, 107, 142, 78, 84, 128, 96, and 114. What is the mean time for completing this task? 103.2 seconds 100 seconds 151 seconds 89 seconds Previous Next > Question 9 Which of the following is not a common measure of variability? standard deviation dependent variable range variance Previous Not save Question 10 A 90% confidence interval for a mean indicates that: The probability of the true mean falling within this interval is 10%. Nominal data were used. The mean is statistically significant The probability of the true mean falling within this interval is 90%. Previous Not say