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Look at the distribution for this word problem and determine if X =98 is a score that is noticeably different from the mean.  In your answer indicate yes or no and then explain why you selected your answer (i.e., back up with reasoning from facts learned in this class). 

WORD PROBLEM #1 At the beginning of the school year, a teacher recruits 5 students from a third grade class and gives them a reading skills test. To evaluate the changes that occur during the year, these same students are tested again at the end of the year.  Their test scores revealed an average change of = 4 points.  If the sample standard deviation for the difference scores is = 2, are these results sufficient to conclude there is a significant difference in test scores between the beginning and the end of the school year?  Use a two-tailed test with

WORD PROBLEM #1 Use the below scores (X) to solve the equations in the next 3 questions.  X 8 5 9 6    

 WORD PROBLEM #3 Use the below frequency distribution table to answer the next 5 questions. X f 6 1 5 2 4 2 3 4 2 1                                         

What is the sample mean (M) for the Nicorette group?

WORD PROBLEM #3 Find the z‑score corresponding to each of the following scores.  To receive full credit, please use notebook paper and pencil to solve the word problem.  Make sure you specifically show all work in each of the steps. Then answer the next 7 questions.  X   98 102 100 99 101

What z-score represents X = 98?  Use the mean and standard deviation you just calculated in the preceding questions to arrive at your answer.  

WORD PROBLEM #1 A sample of n = 25 is selected from a normal population with  

Using notebook paper and a pencil, draw a simple polygon to represent the anxiety (X) scores from above dataset.  Be sure to correctly label x- and y-axes and follow the rules discussed during lecture for making figures appropriately formatted and sized.  Clearly label your polygon with the question number and include it in your file upload with the rest of your hand calculations for this exam.  This polygon is worth 8 pts.   

What z-score represents X = 100?  Use the mean and standard deviation you just calculated in the preceding questions to arrive at your answer.