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A manufacturer of television sets is interested in the effect on tube conductivity of four different types of coating for colour picture tubes. The following conductivity data are obtained.
Coating Type Factor A Factor B Conductivity
1 Low Low 143 141 150 146
2 Low High 152 149 137 143
3 High Low 134 136 132 127
4 High High 129 127 132 129
(a) Using a contrast test if the effect of factor A the same for each level of factor B.
(b) Construct the ANOVA, and test
i.if there any significant difference among treatments.
ii.if the interactions parameters are significantly different from zero
The mean salary of federal government employees on the General Schedule is $59,593. The average salary of 30 state employees who do similar work is $58,800 with population standard deviation = $1500. At the 0.01 level of significance, can it be concl..
Customers arrive at an automated coffee vending machine at a rate of 3 per minute, following a Poisson distribution. The coffee machine dispenses a cup of coffee in exactly 15 seconds.a. What is the average number of people waiting in line?
The population proportion of Americans with diabetes is 9 percent (uc0u960 = 0.09). In repeated random samples of n = 800 Americans, 90% of sample proportions of people with diabetes would fall within______ from
According to a report of the Nielsen company 65% of internet searches in may 2010 used the google search engine. Assume that sample of 20 searches is studied. b) what is the probability that more than 16 of them used google? c) what is the probabilit..
5. A laboratory weights filters from a coal mine to measure the amount of dust in the mine atmosphere. Repeated measurements of the weight of dust on the same filter has a standard deviation of σ = 0.08 milligram (mg) and mean 123 mg.
How many of the data values will fall within the range
Advise John Jones of the tax consequences of Items 1 – 6, above. You should discuss what amounts would be included in his assessable income or, if any item is not assessable income, why that is so. Your answer should include a discussion of the follo..
Conduct an ANOVA
A home remedy of Apple cider is reported to cure verrucas by users on twitter.Most said it cured it, A few said it worked partially . No one said it did not work. Is the evidence sufficient to recommend treatment with cider?
The Operational experts of Woodbridge Electric have announced a breakthrough in the production process and the mean of the same bulb has increased to 9000 hours and the standard deviation has decreasing to 200 hours (again assume a normal distributio..
1. Assume 50 random samples of the same sample size are taken from a population, and a 90% confidence interval is constructed from each sample. How many of the intervals would you expect to contain the true population mean?
Compute expected frequencies for each of the cells in the table in part c). Do you feel that the exponential distribution provides an adequate description of these data?
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