Which statement regarding skewed distributions is FALSE? The "68-95-99" rule does not apply to skewed distributions. If a distribution is negatively skewed, the mean will always be a lower value than the median. If a distribution is negatively skewed, the mode will always be a different value than the median. If a distribution is positively skewed, the mean will always be a higher value than the median.

Which statement below is true? Oit is possible for a distribution of scores to have two means. OIt is possible for a distribution of scores to have two means or two medians Yitis possible for a distribution of scores to have two modes, It is possible for a distribution of scores to have two medians or two modes

The average final exam score for the statistics course is 75%. A professor wants to see if the average final exam score for students who are given colored pens on the first day of class is different. The final exam scores for the 13 randomly selected students who were given the colored pens are shown below. Assume that the distribution of the population is normal. 75, 70, 86, 92, 71, 82, 89, 74, 90, 64, 89, 80, 71 What can be concluded at the the a 0.05 level of significance level of signtficance? a. For this study, we should use Select an answer b. The null and alternative hypotheses would be: Ho: ?vSelect an answerv H1: ?vSelect an answerv C. The test statistic ?v = (please show your answer to 3 decimal places.) d. The p-value = (Please show your answer to 4 decimal places.) e. The p-value is ?v a f. Based on this, we should Select an answerv the null hypothesis. g. Thus, the final conclusion is that ... O The data suggest the population mean is not significantly different from 75 at…

.  Which of the following statement is not correct and why?       A. For normal distributions, the mean is the most efficient.     B. Mean is good for skewed distributions because it takes into consideration of all the possible scores.     C. Median is less sensitive to extreme scores than the mean.     D. Mode becomes rather unimportant as a statistic when the distribution is multimodal.      If the largest observation in a set scores is 99 and the smallest is 71, what is the range, show work?       A. 1     B. 28     C. 71     D. 99      Which of the following statement is correct and why?       A. The median is the mean trimmed 0% and the arithmetic mean is the mean trimmed 100%.     B. A trimmed mean is calculated by discarding the lower and higher 25% of the scores then dividing the sum of the remaining scores by 2.…