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There is not enough evidence against the null hypothesis. Suppose that Is set at .05. Should different decisions be made if the p-value is 0.0499 or 0.0501? It seems unlikely that extremely minor differences in the p-value should lead to such dramatic differences in conclusions. Obvious tests In many cases, hypothesis testing is used when the evidence is obvious. For example, why would you even bother testing if the true mean is 50 ppm?
The rest have no opinion. " Suppose that a a sample of 100 American adults is quizzed on the subject. What is the probability of the following events?
A random sample of 43 light bulbs has a mean life of 677 hours with a standard deviation of 90 hours. Do you have enough evidence to reject the manufacturer's claim?
For planning purposes, the hospital physician staff wold like to know the probability that a given patient is a smother is the patient has a serious illness.
The true average gas mileage for this new model, which of the following gives the null and alternative hypotheses that the consumer group should test?
Why might the assumption of independence be violated? (b) Why might a driver be tempted not to use a seat belt "just on this trip"?
Mean u=222 days and standard deviation o=13 days. What is the probability that a randomly selected pregnancy lasts less than 218 days?
If the sample mean is 10.0 and the sample standard deviation is 0.15, find the 95% confidence interval estimate for the true mean.
Which of the variables below do you think will be roughly normally distributed? Please select all that apply.
Which of these variables are discrete and which are continuous random variables?
At the .05 significance level, is there a difference in the proportion of viewers watching the three channels?
How large should the sample size be if she wishes to be accurate within $0.10. A previous study showed that the standard deviation of the price was $.12.
Tourism is one consideration for CoffeeTime's future, A survey of 1,233 visitors to mumbai last year revealed that 110 visited a small cafe during their visit.
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