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Z F a c t o r f o r 1 T a i l T e s t s = N O R M S I N V ( 0 . 0 1 ) * 1 = N O R M S I N V ( 0 . 0 2 ) * 1 = N O R M S I N V ( 0 . 0 4 ) * 1 = N O R...
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ROUND ALL ANSWERS TO AT LEAST 4 (FOUR) QUALITY DECIMAL POINTS. THIS INCLUDES PERCENTAGES.

  List and clearly label all eight steps.

I completed the first question to provide an example of what I need. 

I also provided the tests needed for each question, but I could be wrong about those.  please round to 4 places. 

  This homework assignment is due by Monday December 5, 2016 at 11:59 PM.


Z F a c t o r f o r 1 - T a i l T e s t s = N O R M S I N V ( 0 . 0 1 ) * - 1 = N O R
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M S I N V ( 0 . 0 2 ) * - 1 = N O R M S I N V ( 0 . 0 4 ) * - 1 = N O R M S I N V ( 0 . 0 5
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BMRT 21004 Module 17 HW (20 Points) 4 Pages HW Problem 46. (5 pts) Is there a difference in the insurance costs employers pay for their managers and their professional specialty workers? The Bureau of Labor Statistics (BLS) wants to study this question. They randomly sample 35 managers which results in a sample mean cost of $1.84 per worker per hour with a sample standard deviation of $.38. They also randomly sample 41 professional specialty workers resulting in a sample mean cost of $1.99 with a standard deviation of $.51. At the .02 level of significance, test to determine if there's a difference in the hourly rates employers pay for insurance for their managers and their professional specialty workers? List and clearly label all eight steps. Step 1. H 0 : 1 = u 2 H a : 1 u 2 Step 2. Z = ( X x 1 - X x 2) - ( 1 - u 1) s 1 2 n1 + s 2 2 n2 Step 3. a=.02 Step 4. Reject the Null Hypothesis if Z < -2.3263 or if Z > 2.3263 Step 5. Population 1 (managers) n 1 = 35, X x 1 =$1.84, s 1 =$.38 Population 2 (specialty workers) n 2 = 41, X x 2 = $1.99, s 2 = $.51 Step 6. Z = ( X x 1 –  X x 2) – ( 1 – u1) s 1 2 n1 + s 2 2 n2 = (1.84 – 1.99) – (0) ( .38 ) 2 35 + ( .51 ) 2 41 = -1.4660 Step 7. -1.4660 IS NOT LESS THAN -2.3263 [ -1.4660 >- 2.3263] Therefore we fail to reject the Null Hypothesis. Step 8. At the .02 level of significance, there is enough evidence to conclude that average salaries for managers and specialty workers are different.
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HW Problem 47. (5 pts) A researcher wants to determine if the children of parents with college degrees perform better on the AP Calculus BC test than the children of parents who do not have college degrees. 18 high school students whose parents have college degrees are randomly sampled resulting in a sample mean score of 3.4 with a sample standard deviation of .4. 21 students whose parents are not college- educated are also randomly sampled, resulting in a sample mean AP score on the Calculus BC test of 3.0 with a sample standard deviation of .5. At the .05 level of significance, is there enough evidence to conclude that the children of parents with college degrees perform better on the AP Calculus BC test than the children of parents who do not have college degrees? List and clearly label all eight steps. Probably using t test. Could be wrong t = ( X x 1 -  X x 2) - ( 1 - m1) s 1 2 ( n 1 1 ) + s 2 2 ( n 2 1 ) n1 + n2 2 1 n1 + 1 n2
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