If sample size is greater than or equal to 30 then sample standard deviation can be approximated to population standard deviation for the Select one: O a. standard interval deviation O b. known standard deviation O c. unknown standard deviation O d. population interval theorem Which of the following is NOT true about the standard error of a statistic? Select one: O a. The standard error increases as the sample size(s) increases. O b. The standard error measures, roughly, the average difference between the statistic and the population parameter. O c. The standard error can never be a negative number. O d. The standard error is the estimated standard deviation of the sampling distribution for the statistic. Which of the following is not a requirement of a binomial distribution? Select one: O a. Only two possible outcomes O b. Equally likely outcomes O c. A constant probability of success. O d. A fixed number of trials