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1) The test averages for 40 students are listed below. Use 8 classes (NOT BINS) to construct a frequency distribution table. The first column will be the classes, second will be the frequencies, third are the relative frequencies, forth the class midpoints, and last are the cumulative frequencies. From the table draw a histogram, a polygon, and an ogive (a cumulative frequency graph).
11
16
17
18
19
20
21
22
23
24
25
28
29
30
31
32
33
34
35
36
40
2) Find the mean, median, mode, variance and standard deviation for the following nine data values.
81
82
83
84
86
88
89
91
3) Find the four quartiles and the 20th and 80th percentiles for the above data.
Is the mean Hemoglobin level of a group of high-altitude workers different from 16g/cc and does the mean speed of 50 cars as checked by radar on a I-70 differ from 65mph?
Determine whether this data already provides an expected relative error introduced by the simulation of below 5%. If not, compute how many new simulations you should run in order to reduce the expected relative error introduced by the simulation b..
Decision Trees are graphic displays of the decision process. When do you feel it is appropriate to use decision trees?
Internet and the articles database in the library for a real-life illustration of simulation. For hint, type the word "Simulation" followed by a topic of interest to you. Carefully review the search item.
A screening test for a newly discovered disease is being evaluated. In order to determine the effectiveness of the new test, it was administered to 900 workers; 150 of the individuals diagnosed with the disease tested positive.
What test or tests would you use to rule out chance from causing the apparent differences in these data and is there a significant correlation?
Analyze the processed data in Statistical survey.
Can the company rely on the fact that the strength of the chemical is identical from batch to batch and from barrel to barrel and what is the mean strength of the chemical in these stored barrels? How prccisc is that estimate?
Determine and interpret the sensitivity of mammography.
Binomial probability distribution
Evaluate the correlation coefficient.
Binge drinking and alcohol-related behaviours amongst Pacific youth: a national survey of secondary school students
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