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From the following scores

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Question

I.                From the following scores on two tests, calculate the values

indicated:

                      Test 1 (X): 29, 28, 25, 25, 22, 22, 21, 20, 19, 19

                      Test 2 (Y): 34, 31, 35, 30, 31, 28, 28, 25, 24, 24

           10. Mean of Test 1 (X)

Mx=    _____

11. Mean of Test 2 (Y)

My=    _____

12. Summation of squared deviations scores for Test 1

Σx2=  _____

13. Summation of squared deviations scores for Test 2

Σy2 = _____

14. Summation of the product of deviation scores for Test 1 and Test 2 

Σxy = _____

15. Correlation Coefficient:

 r =     _____

 
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Use the following data to answer questions

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Question

V. Use the following data to answer questions 25-30. (An asterisk indicates the correct answer.)ITEM

1 A B C D* ITEM 2 A B C* D

UPPER 2 4 2 4 UPPER 0 5 5 5

LOWER 6 1 3 2 LOWER 0 3 11 1

Identify your response by underlining, highlighting or marking with an asterisk.

25. What is the difficulty level of Item 1?         26. What is the difficulty level of Item 2?

a.     4/12                                                              a.  5/15

b.     6/12                                                              b.  6/15

c.     2/24                                                             c.  5/30

d.     4/24                                                              d.  6/30

e.     6/24                                                              e.  16/30

27. What is the discrimination index of Item 1?       28. What is Item 2’s discrimination index?

a.   2/12                                                        a.   6/15

b.   6/12                                                        b.  4/15

c.   2/24                                                         c.  -6/15

d.   6/24                                                        d.  -6/30

29. Which distractor on Item 1 needs revision or elimination?

a.     1-A

b.     1-B

c.     1-C

d.     None of these

30. Which of the following is indicated by Item 2?

a.     Ambiguous

b.     Guessing

c.     Miskeyed

d.     Too difficult

 
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the Shapiro-Wilks test

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Question

Please explain why a student should use the Shapiro-Wilks test with a sample size less than 50, and use the

Kolmogorov-Smirnov test with a sample size greater than 50.

 
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What is the difference between ADD and ADHD, please explain

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What is the difference between ADD and ADHD, please explain

 
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