Statistics for Research

Module 6 Form B

You will need your text (for tables) and SPSS. Save this test as a Word or rtf document and then respond right into the test, including any copying any SPSS output into the document. When you have finished the test, attach your results to an email and send it to me with subject line Module 6 yourname .

1. Crop yields per acre depend on many variables, but two obvious ones are fertilizer and weed control. In an effort to test the effects of various levels of fertilizer and of herbicide, researchers selected six plots of land and subdivided each into eight pieces. Each of the eight pieces of each plot was treated with one of the eight combinations of fertilizer (none, light, moderate, heavy) and herbicide (none, some). The per acre yields of each piece of land are recorded below:
   In the data, levels of fertilizer are 1 (none), 2 (light), 3 (moderate), 4 (heavy) and levels of herbicide are 1 (none) and 2(some).
   fert herb yield
   1 1 60.79
   1 1 61.87
   1 1 58.37
   1 1 60.76
   1 1 59.26
   1 1 64.32
   2 1 62.01
   2 1 66.37
   2 1 62.44
   2 1 59.85
   2 1 60.52
   2 1 62.36
   3 1 57.47
   3 1 65.42
   3 1 66.15
   3 1 64.53
   3 1 65.28
   3 1 63.56
   4 1 60.20
   4 1 62.57
   4 1 64.23
   4 1 60.17
   4 1 60.90
   4 1 61.92
   1 2 61.55
   1 2 64.67
   1 2 63.43
   1 2 62.24
   1 2 62.99
   1 2 61.41
   2 2 63.46
   2 2 62.95
   2 2 61.52
   2 2 64.76
   2 2 68.82
   2 2 65.83
   3 2 68.75
   3 2 71.19
   3 2 66.18
   3 2 66.12
   3 2 63.68
   3 2 70.08
   4 2 58.92
   4 2 63.67
   4 2 65.04
   4 2 68.89
   4 2 67.62
   4 2 65.72
   Give a statement to be tested, identify the random variables involved and the assumptions you make about them, state the hypotheses to be tested, ask SPSS to run the analysis for you, including a post hoc, and then discuss the outcome. Describe the critical region(s) upon which you base your decisions. Include any SPSS output in your discussion.
2. We wish to assess the effect of three different track surfaces on sprinter speed. Six world-class sprinters are asked to run five 100m dashes on each of the three track surfaces. Their average times are recorded below.

Surface1 Surface2 Surface3

Sprinter1 9.89 10.10 10.00

Sprinter2 9.89 10.08 10.02

Sprinter3 9.90 10.10 10.00

Sprinter4 9.90 10.10 10.00

Sprinter5 9.89 10.09 9.99

Sprinter6 9.92 10.09 10.00

Using the sprinters as blocks, discuss the differences between the track surfaces as suggested by SPSS. Give a statement to be tested, identify the random variables involved and the assumptions you make about them, state the hypotheses to be tested, ask SPSS to run the analysis for you, including a post hoc, and then discuss the outcome. Describe the critical region(s) upon which you base your decisions. Include any SPSS output in your discussion.

Price: $20.0

Solution: The downloadable solution consists of 9 pages, 1100 words and 7 charts.
Deliverable: Word Document