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A study of computer-assisted learning examined learning of "Blissymbols" by children. Blissymbols are pictographs (think of Egyptian hieroglyphs) which are sometimes uitlized to help learning-impaired children communicate. Researcher designed two computer lessons which taught same content using same examples. One lesson required children to interact with material, where as in other children controlled only pace of the lesson. Call these two styles "Active" and "Passive." Children were allotted at random to Active and Passive groups. After lesson, computer presented a quiz which asked the children to recognize 56 Blissymbols. Here are numbers of right identifications by 24 children in Active group: 24 children in Passive group had these counts of correct identifications: Is there good evidence which active learning is superior to passive learning?
The media often attempts to predict the outcome of national elections. Why are they often wrong? Based on the concepts presented in this module's readings, how could the system be improved?
A medical doctor wishes to test the claim that the standard deviation of the systolic blood pressure of deep sea divers is less than 450. To do so, she selected a random sample of 20 divers and found s = 432.
A recent article in the Arizone Republic indicated that the mean sellingprice of the homes in the area is more than $220,000. Can we conclude that the mean selling price in the Goodyear, AZ area is more than $220,000.
Test the equality of the means of three populations.
We will select a random sample of 8 cigarettes and conduct a hypothesis test at the 10 % level of significance to determine whether the true mean nicotine content of all cigarettes differs from 8.4 mg.
Leasing agents from the Triangle Mall Management Corporation have suggested that Sunflowers Apparel considered several locations in some of Triangles newly renovated lifestyle malls that cater to shoppers with higher than mean disposable income.
Registration process takes, on average, 2 minutes per patient. Among patients who get prescriptions, average time spent with doctor is 5 minutes. Among those admitted to hospital, average time is 30 minutes.
State the null and alternate hypotheses if you want to determine whether the mean amount spent is higher for men than for women,
A nutritionist conducted an experiment on memory for dreams. She wanted to test whether it really was true that eating cheese before going to bed made you have bad dreams. Over three nights, the nutritionist fed people different foods before bed.
Decision rule which chooses alternative associated with smallest maximum opportunity loss is?
Florida State University administers a test of mathematics placement to students when they first enter the university.
A college student is taking 5 courses in a semester. He is willing to assume that he will get an A with probability 0.10, a B with probability 0.80, and a C with probability 0.1 in each of the courses. He defines X1, X2, and X3 to be the number of..
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