True or False? a). A parameter is a number that describes so…

True or False? a). A parameter is a number that describes some characteristic of the population and a statistic is a number that describes some characteristic of the sample. [ansa] b). Let X1, X2, …, Xn be normally distributed random variables with mean μ and variance σ2. Then, in Bayesian approach, μ and σ2 can be considered as random. [ansb] c). As the sample size increases, the standard deviation of the sample mean increases. [ansc] d). The variance of a random variable can be a negative number. [ansd] e). For