Estimate the true proportion of home
A report states that 38% of home owners had a vegetable garden. How large a sample is needed to estimate the true proportion of home owners who have vegetable gardens to within 4% with 95% confidence?
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Let X1, X2, X3 be three independent random variables with binomial distributionsb(4, 1/2), b(6, 1/3), b(12, 1/6), respectively.Find
For the standard normal probability distribution , the area to the right of the mean is (-0.5, 0.5, 1, any value between 0 and 1)
The mean gross annual income of certified welders are normally distruted with the mean of 20,000 and a standard deviation of 2200. The ship building association wishes to find out whether this number is still accurate. you take a sample of 45 wel
What is the difference between dependent and independent samples? Discuss differences is statistical treatment, statistical power, and data management.
Sketch the normal curve indicating the positions of the critical value, critical region, and test statistic. Would you reject or fail to reject the null hypothesis?
Does the confidence interval from part (a) gives limits in which we expect 95% of the sample data to lie? why or why not. Does the confidence interval from part (a) gives limits in wich we expect 95% of the popultaion to lie? why or why not
Consider a carton of twelve eggs, of which three are rotten. Suppose we randomly select five eggs. Compute the probability that there is at least one rotten egg among the selected eggs.
Of the 14 individuals in the sample, 12 are rated higher after the course than before, 1 individual is rated lower, and 1 individualss assessment is unchanged. Using a significance level of 0.05, can we conclude from this information that the cour
Conduct a one-tailed hypothesis test given the information below. A manufacturer wants to increase the shelf life of a line of cake mixes. Past records indicate that the average shelf life of the mix is 116 days.
Find the probability that the group receives exactly 15 calls in a given hour. Find the population mean, the population variace, and the population standard deviation for the number of calls.
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