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In a study of 420,145 cell phone users, 105 subjects developed cancer of the brain or nervous system. Test the claim of a somewhat common belief that such cancers are affected by cell phone use. That is, test the claim that cell phone users develop cancer of the brain or nervous system at a rate that is different from the rate of 0.0340% for people who do not use cell phones. Because this issue has such great importance, use a 0.005 significance level. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method and the normal distribution as an approximation to the binomial distribution.
conduct a web search for order statistics. find and post an example of an experiment that uses order statistics and
Find the probability that on any given day the daily power consumption will exceed 12 million kilowatt-hours.
The concentration of glucose(mg/dl) for all samples was measured on one run of a spectrophotometer 1. give the statistical model and full explain each component.
a survey of 1085 adults asked do you enjoy shopping for clothing for yourself? the results indicated that 51 of the
After the new advertising campaign was launched, a marketing study found that the mean spending for 300 respondents in the 18-34 age groups was $75.86, with a standard deviation of $50.90. Is there sufficient evidence to conclude that the advertis..
What are its classes? What are their periods? Are they transient or recurrent? Compute the transition probabilities Pi,j .
the mean diameter of a ball bearing produced by a certain manufacturer is 0.80 cm with a standard deviation of 0.03 cm.
Formulate a statistical hypothesis appropriate for the consumer groups purpose - Compute the mean average miles per gallon and compute the sample variance and sample standard deviation.
a random committee of size 3 is selected from 4 doctors and 2 nurses. write a formula for the probability distribution
(a) At the 5 percent level of significance, does this sample prove a violation of the guideline that the average patient should pay no more than $250 out-of-pocket? State your hypotheses and decision rule. (b) Is this a close decision?
the productivity of a factory has been recorded over 10 months together with forecasts made the previous month by the
Find Karl Pearson's correlation coefficient between the sales and expenses from the data given below: Sales (Rs. Lakhs) 50 50 55 60 65 65 65 60 60 50 Expenses (Rs. Lakhs) 11 13 14 16 16 15 15 14 13 13?"
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