C Its range is from negative infinity to positive infinity Mean C Median C Mode Midrange Question 20 1. A 95% confidence interval for the mean can be inter- preted to mean that: Question 18 C if all possible samples are taken and confidence intervals are calculated, 95% of those intervals would include the true population mean somewhere in their interval 1. The number of absences per year a worker has is an example you can be 95% confident that you have selected a sample whose interval does include the of what type of data? population mean both a) and b) are true. C nominal neither a) nor b) is correct discrete continuous qualitative 5 points You can be 95% confident that you have selected a Question 19 sample whose interval does 1. Which measure of central tendency can be used for include the population mean both numerical and categorical variables