Which statement best captures the rationale behind using a sample mean to infer the true value of a population mean? a. It is based on the certainty of knowing the population parameter's true value. b. It is a safe and practical approach when the population parameter's value is already known. c. It is the most feasible method since surveying every individual in the population is typically impractical. d. It is preferred because it eliminates all forms of error in the estimation process.Which of the following best describes the importance of setting ground rules before discussing types of hypotheses in more detail? a. Ground rules determine the specific values of the population parameters. b. Ground rules are necessary for defining what constitutes a population. c. Ground rules provide a framework that ensures clarity and consistency in the understanding and application of hypothesis testing. d. Ground rules help to eliminate the need for statistical significance in testing