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A sample of 300 cars having cellular phones and one of 400 cars without phones were tracked for 1 year. The following table gives the number of these cars involved in accidents over that year.
Accident
NoAccident
Cellular phone
22
278
No phone
26
374
Use the above to test the hypothesis that having a cellular phone in your car and being involved in an accident are independent. Use the 5 percent level of significance.
Class finds 54% of 450 randomly selected voters are in support. Both groups will create 95% confidence intervals. Which group concludes that the outcome is too close to call? Why?
Test the claim that the mean weight loss is greater than 0. Based on these results does the diet appear to be effective. Does the diet appear to have practical significance.
a cement manufacturer claims that concrete prepared from his product has a relatively stable compressive strength and
smith is a weld inspector at a shipyard. he knows from keeping track of good and substandard welds that for the
the probability that a university graduate will be offered no jobs within a month of graduation is estimated to be 5.
Specific part of which 10 are defective and 90 are non defective. three parts are selected without replacement. construct a tree diagram representing the sample space.
A random sample of 1001 University of California faculty members taken in December 1995 was asked, "Do you favor or oppose using race, religion, sex, color, ethnicity or national origin as a criterion for admission to the University of California?
How can I conduct statistic experimental design for three independent variable (time, amount, temperature) are useful to predict Y? Please include any approach steps and How can I interpreted?
the number of monthly breakdowns of a computer is a random variable having poisson distribution with lambda1.8. use
part 1shown below are the sales revenue and advertising cost data for seven companies published by international
The mean of a sample is 22.5. The mean of 1000 bootstrapped samples is 22.491. The bias of the bootstrap mean is
Do you think this statement has any merit? Why or why not? Explain why the manager may have said it and then further substantiate his argument or compose a rebuttal.
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