Select aph IN Styles Editing 2.5 GB 11.8 GB 10 GB 2 GB 8 GB 10 GB 15 GB 80 GB 10 GB 30 GB 60 GB | 6 GB 25 GB 60 GB 30 GB 25 GB 40 GB 80 GB 60 GB 12 GB| 10 GB By calculator, 28.18 GB/ruth/subscriber ; and 23.0023 GB/ruth/subscriber Assumptions for using z-test: 1. Randomly select one sample 2. The dependant variable is at least approximately normally distributed in the population and involves an interval or ratio scale The mean of the population of raw scores under another condition of the independent variable 4. The true standard deviation of the population described by null hypothesis Test statistic: = = X-1 - 3.707 Step 4: Making decision and conclusion (8 marks)