Course: STAT 100-101 (Wint x $100 termtest2.pdf X stattables_twopage-rotated x Stat 100 Unit 7 Notes.pdf X *Homework Help - Q&A from X 15 (15) WhatsApp X + V X -> C ourcourses.uregina.ca/pluginfile.php/3031981/mod_resource/content/1/s100%20termtest2.pdf A E $100 termtest2.pdf 1 / 4 - 100% + Stat 100 Winter 2022 - Term Test #2 Your Name: Your Student ID: Due: Monday, March 14, 2022, 4:45 PM Question #1: (5 marks) a) A researcher is investigating the life span of a particular breed of fruit fly. They wish to estimate the true population mean, under the assumption that the population standard deviation is 3.51 days. What is the minimum sample size that needs to be collected in order to guarantee that the estimate will be within 0.5 days of the true population mean with 95% confidence? Show your calculation. 2 3 b) The above situation estimated a parameter with 95% confidence. Explain in your own words (in full sentences, referring to the discussion in class) why you wouldn't always want to increase the confidence. In other words, why not always go for 99% or 99.9% confidence - what is the drawback of increased confidence