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1. Suppose that an automobile parts wholesaler claims that .5 percent of the car batteries in a shipment are defective. A random sample of 200 batteries is taken, and four are found to be defective.
a. Use the Poisson approximation discussed in Exercise 5.35 to find the probability that four or more car batteries in a random sample of 200 such batteries would be found to be defective, if we assume that the wholesaler's claim is true.
b. Based on your answer to part a, do you believe the claim? Explain.
2. Joint Distributions and the Covariance (Optional) 215
3. In the context of the hypergeometric distribution, explain the meanings of N, r, and n.
4. When can a hypergeometric distribution be approximated by a binomial distribution? Explain carefully what this means.
Text Book: Business Statics in Practice By BOWERMAN.
A recent study examined the association between high blood pressure and increased risk of death from cardiovascular disease. There were 2676 men with low blood pressure and 3338 men with high blood pressure. In the low-blood-pressure group, 21 men di..
Use the Excel output in Figure 8.15 to calculate a t-based 95 percent confidence interval for m, the mean of the breaking strengths of all possible new trash bags.
1. Do this exercise by hand. A famous brand-name manufacturer wants to know whether people prefer Nibbles or Wribbles. They sample each type of cracker and indicate their like or dislike on a scale from 1 to 10. Which do they like the most?
What type of variables you have. Qualitative or Quantitative and indicate what type of measurement scale is being used.
Describe the error in the conclusion
What are the assumptions made in performing the hypothesis test in Question 3? Are these assumptions reasonable? Provide explanation to substantiate your view.
Beronulli Law of Large Numbers Let X1, X2, ..., Xn be a random sample from Bernoulli(p). Let Yn = Σ( to n) Xi. Let Wn = Yn/n. Find the limiting distribution of Wn using MGF method.
Calculate a 95 percent confidence interval for the mean audit delay for all financial companies. Calculate a 95 percent confidence interval for the mean audit delay for all industrial companies.
A foreign language course and a psychology course?
This study investigates whether there are differences in the outcomes of three different treatments for anxiety. The treatment conditions that are compared are treatment with medication, treatment with psychotherapy, and placebo (inactive pills). In ..
A few days ago you answered a question I had on probability. The original equation was R(t)=a^(-bt). In your answer you changed it to R(t) = a* e^(-bt). Can you explain why you added the e?
Perform exploratory data analysis on the relevant variables in the dataset. When possible, include appropriate graphs to help illustrate the dataset.
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