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1. Based on the sample results in Exercise 10.109, construct and interpret the 95% confidence interval for the population proportion. Is the hypothesized propor- tion (0.25) within the interval? Given the presence or absence of the 0.25 value within the interval, is this con- sistent with the findings of the hypothesis test conducted in Exercise 10.109?
2. In making aluminum castings into alternator housings, an average of 3.5 ounces per casting must be trimmed off and recycled as a raw material.
A new manufacturing procedure has been proposed to reduce the amount of aluminum that must be recycled in this way. For a sample of 35 castings made with the new process, data file XR10111 lists the weights of aluminum trimmed and recycled. Based on the sample data, and using the 0.01 level, has the new procedure significantly reduced the average amount of alumi- num trimmed and recycled? Identify and interpret the p-value for the test.
retired workers and disabled workers both receive social security benefits. what information would we need to test the
use the binomial probability distribution when your random variable is the number of successes on n success or failure
what are some of the important factors that have brought about the e-global
a health care facility is interested in monitoring the primary c-section rate. monthly data on the number of c sections
Explain how we can approximately do this by a double sampling scheme that first takes a subsample of size 30 and then chooses the total sample size by using the results of the first subsample.
A candy confectioner measures the weight of 30 pieces of candy and obtains a mean and standard deviation of 32.5 gms and 2.6 gms, respectively. Construct the 98% confidence interval for the population mean.
5 cups of coffee per day with a standard deviation of 1.5. The distribution is normal. What proportion of faculty consume an amount between 4 and 6 cups?
During the period of time that a local university takes phone-in registrations, calls come in at the rate of one every two minutes.
In a survey about soft drinks it was found that 5% of the respondents like diet soft drinks. 12% of the respondents like the brand Coke. Of the diet soda drinkers, 40% like Coke. What is the probability that a respondent did like diet drinks or di..
In a randomized, double-blind, placebo-controlled trial of children, echinacea was tested as a treatment for upper respiratory infections in children.
Determine the calculated value of the test statistic? What distribution does test statistic have when null hypothesis is true?
at parkview at any given time the probability that a randomly selected student is a female is 30. with this binomial
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