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

A professor determined that the mean score on the second exa…

A professor determined that the mean score on the second exam for 5 students was 77. When returning the papers to the students, the professor was missing one paper. The difference between the scores on the four papers returned and the mean were -4, 5, 6, and -6. Determine the fifth score.