Final answer:
Relative strength is a technical indicator that compares a stock's performance with another stock or index. Validity refers to how well a measurement reflects the intended study topic. Quantitative data is numerical, while qualitative data includes descriptions and observations. So, the correct answer is option 1.
Step-by-step explanation:
Relative strength is a technical indicator. It helps investors and traders to compare the price movement of a particular stock or market with a benchmark or another stock or market. The relative strength indicator assesses how strong or weak a stock is compared to another stock or market index, which provides insight into its performance over time.
Regarding the reference information provided, a measurement is considered valid when it measures what it is supposed to measure, and hence it is the topic of the study. Meanwhile, in contrast, quantitative research data refers to data that can be quantified and verified, and it typically involves measurable variables.
On the other hand, qualitative research data involves non-numerical data, such as descriptions, which can come from interviews, observations, or analysis of texts, and requires a different approach for evaluation.