As a marketing analyst intern, you are asked to assess the different digital marketing strategies employed by three e$-$commerce alternatives: StyleHub, TrendSetters, and VogueVilla. Each company employs a distinct strategy. StyleHub relies on influencer collaborations, TrendSetters uses targeted advertisements, and VogueVilla combines email marketing with social media promotion.

To evaluate these strategies, each company provides you with an As an intern in a venture capital firm, you are tasked with analyzing the investment returns of startups in the technology sector. The firm has invested in $55$ different tech startups over the past five years. You are given a dataset representing the annual return on investment $($ROI$)$ in percentage for each startup. The data reflects a wide range of performances, from highly successful ventures to those that underperform.

Unless stated otherwise, assume that the assumptions for all tests are met.