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Can you solve and explain these questions for me?
1) The weights of aluminum castings produced by a process are normally distributed. A random sample of 5 castings is selected; the sample mean weight is 2.21 pounds; and the sample standard deviation is 0.12 pound. Construct the 98% confidence interval for the population mean casting weight.
2)Ten analysts have given the following fiscal-year earnings/share forecasts for a stock. Assume that the analyst forecasts are normally distributed. (Also assume that we can ignore the finite population correction factor.)
Forecast $1.40 $1.43 $1.44 $1.45 $1.47 $1.48 $1.50
Number of analysts 1 1 3 2 1 1 1
1) What are the mean and the standard deviation of forecasts?
2) Provide a 95 percent confidence interval for the population mean of the forecasts.
the makers of mini-oats cereal have an automated packaging machine that can be set at any targeted fill level between
Suppose that 8% of all bicycle racers use steroids, that a bicyclist who uses steroids tests positive for steroids 96% of the time, and that a bicyclist.
Estimate with 90% confidence the mean number of weeks out of town, assuming that the population is normally distributed with a standard deviation of 6 weeks.
Explain the strength of relationship between the assets?
Independent random samples of sizes nX = 8 and nY = 10 were extracted from normal populations having unknown means. What is the 95% confidence interval for µX - µY if the population variances are unknown?
Give two alternative representations of the log-likelihood function - How would the log-likelihood function differ for the logit model?
"Strategizing for the future" is management lingo for sessions that help managers make better decisions. Managers who deliver the best stock performance.
Write the null and alternative hypothesis symbolically and identify which hypothesis is the claim - Is the test two-tailed, left-tailed, or right-tailed? Explain.
What are the most important concepts you have learned from conduct one-and two-sample tests of hypotheses? What would you recommend to your management/leadership based conduct one-and two-sample tests of hypotheses?
To test the hypothesis that students who finish an exam first get better grades, a professor kept track of the order in which paper were handed in.
Assume the sample size is changed to 50 restaurants with the same sample mean. Find a 90% confidence interval estimate for the population mean delivery time.
the number of telephone calls coming into a businesss switchboard averages 4 calls per minute.let x be the number of
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