QUESTION 6 As the estimated standard error of the mean (SEM) decreases, we can expect O A. the sample means to become more similar to the population mean. O B. the shape of the sampling distribution of means to become narrower and taller. O C. the variability across sample means (i.e., from one mean to the next) to become smaller. O D. All of the above QUESTION 7 The estimated standard error of the mean (SEM) provides information about O A. the average difference between the sample means and the population mean. O B. the average difference between samples means, where each sample mean is based on the same sample size. O C. the average difference between subject scores and the sample mean in the original units of measurement. O D. how scores are spread-out around the SEM in the original units of measurement