Answer Happy

Question 1: A market research company claims that the type of smartphone people prefer depends on their gender. To test this claim 100 randomly chosen men and 100 randomly chosen women were given current versions of both an Android phone and iPhone for a one-week period and asked to indicate which one they preferred at the end of that time. The resulting data are shown in the table below: Phone Type Android iPhone 39 61 Total Female 100 Gender Male 76 24 100 Total 115 85 200 (a) Write down the research question for this study (6) Write down the statistical hypothesis to be tested by this study. (c) Complete the contingency table below by adding the expected values. Phone Type Total Android Female 39 iPhone 61 100 Gender Male 76 24 100 Total 115 85 200 (d) Calculate the Chi-squared test statistic. Show all working for full marks. (e) Find the critical value from tables and write your statistical conclusion and plain English interpretation