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Statistics a survey claims that 9 out of 10 doctors recommend for their patients who have children. To test this claim against an alternative that the actual proportion of doctors who would do this is less than the claimed, a random sample of 100 doctors was considered. In this sample 83 doctors said that they reccomend asprin for their patients with children Conduct a hypothesis test using the P-Value method. What conclusions would you make when a=o.2 and a=0.02.
What are the differences between probability distribution functions and probability density functions? Why do we care?
For a normal random variable X with mean 70 and standard deviation 10. Calculate the probability that 60 80}.
Find a 95% confidence interval for the population mean selling price of all homes in this neighborhood.
Suppose you want to test the hypothesis that students who study one week before score different from students who study the night before. A 2 sample t-test test is run based on your data and a p-value is calculated to be 0.0219. What is the approp..
What is the effect of child care on the security of attachment which develops between infant and caregiver. You suspect that infants in child care will be insecurely attached at 11 months after being in a child care from 2 months of age,
In order to estimate the average time spent on the computer terminals per student at a local university, data were collected for a sample of 81 business students over a one week period.
Suppose the horses in a large stable have a mean weight of 1464 lbs, and a standard deviation of 111. What is the probability that the mean weight of the sample horses would differ from the population mean by less than 11 lbs if 34 horses are samp..
Can you provide some pros and cons of using descriptive and inferential statistics to make managerial decisions.
Determine the setting for the mean so that no more than 1% of the cans of paint will be unacceptable.
Suppose you are testing the differences in attitudes toward health care reform using Democrats, Republications, and Independents. What statistical test would you use?
Based on these results, a confidence interval for the population mean is found to be μ = 5.7 ± 4.4. Find the degree of confidence.
What would be an appropriate graphical representation to show the dispersion of home prices in a particular city, such as San Diego? Consider what would be the dependent (y) and independent (x) variables? Explain your reasoning.
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