Publications by Saad Mirza
Flipped Assignment 7 - BY HAND
Do problem by hand, submit picture/scan of your handwritten work. You may use R only as a “calculator” to only support your calculations or to look up critical values from the F-table, do not use built in AOV() or ANOVA() commands CRD with Fixed Effects (by hand) 1 Question: A rental car company wants to investigate whether the type of ...
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Homework 3 - Week 4
1 Question 3.7: The tensile strength of Portland cement is being studied. Four different mixing techniques can be used economically. A completely randomized experiment was conducted and the following data were collected: Observations of Tensile Strength Mixing Technique 1 2 3 4 1 3129 3000 2865 2890 2 3200 3300 2975 3150 3 2800 2900 2985...
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Flipped Assignment 8 - BY HAND
Contrasts and Multiple Comparisons 1 Question: The effective life of insulating fluids at an accelerated load of 35kV is being studied. Test data have been obtained for the four types of fluid. The data from this experiment is given below. Previous calculations using this have shown that SSTr=30.17 and SSE=63.99 1.How many degrees of fre...
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Flipped Assignment 9 Group 6
1 Question:1 1.Suppose we wish to design a new experiment that tests for a significant difference between the mean effective life of these 4 insulating fluids at an accelerated load of 35kV. The variance of fluid life is estimated to be 4.5hrs based on preliminary data. We would like this test to have a type 1 error probability of 0.05, a...
3271 sym R (3152 sym/20 pcs) 6 img
Homework - Week 5
1 Question 3.7: The tensile strength of Portland cement is being studied. Four different mixing techniques can be used economically. A completely randomized experiment was conducted and the following data were collected: Observations of Tensile Strength Mixing Technique 1 2 3 4 1 3129 3000 2865 2890 2 3200 3300 2975 3150 3 2800 2900 2985...
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Flipped Assignment 10 - Group 1
VST and Kruskal-Wallace Assignment: 1 Question: 1: civil engineer is interested in determining whether four different methods of estimating flood flow frequency produce equivalent estimates of peak discharge when applied to the same watershed. Each procedure is used six times on the watershed, and the resulting discharge data (in cubic fee...
2597 sym R (5638 sym/22 pcs) 12 img 1 tbl
Homework 5 - Week 6
1 Question 3.23: The effective life of insulating fluids at an accelerated load of 35 kV is being studied. Test data have been obtained for four types of fluids. The results from a completely randomized experiment were as follows: Is there any indication that the fluids differ? Use \(\alpha=0.05\). Which fluid would you select, given that th...
8111 sym R (7649 sym/38 pcs) 18 img
Flipped Assignment 11
1 Question:1 1. A chemist wishes to test the effect of four chemical agents on the strength of a particular type of cloth. Because there might be variability from one bolt to another, the chemist decides to use a randomized block design, with the bolts of cloth considered as blocks. She selects five bolts and applies all four chemicals in ra...
2934 sym R (940 sym/5 pcs) 2 img
Flipped Assignment 12
1 Question 1: The effect of five different ingredients (A, B, C, D, E) on the reaction time of a chemical process is being studied. Each batch of new material is only large enough to permit five runs to be made. Furthermore, each run requires approximately 1.5 hours, so only five runs can be made in one day. The experimenter decides to ...
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Homework - Week 7
1 Question 4.3: A chemist wishes to test the effect of four chemical agents on the strength of a particular type of cloth. Because there might be variability from one bolt to another, the chemist decides to use a randomized block design, with the bolts of cloth considered as blocks. She selects five bolts and applies all four chemicals in ra...
4115 sym R (3939 sym/17 pcs) 2 img