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List the steps involved in hypothesis testing using: a) the traditional/classical method; b) the probability-value method. Provide an example of each.
Based on the information in part (a), what decision should the director make about the books used for the courses if the goal is to keep the cost below $300?
Drug testing of job applicants - In 1990, 5.8% of job applicants who were tested for drugs failed the test. At the 0.01 significance level, test the claim that the failure rate is now lower if a simple random sample of 1520 current job applicants ..
The manager of a local bank wants to estimate the average amount held in checking accounts by the customers. A random sample of 30 customers is selected, and the results indicate a sample average of $4,750 and a sample standard deviation of $1,200..
The time it takes a student to finish a electronics test has a uniform distribution between 50 and 70 minutes.
At the .01 significance level, is there a relationship between job pressure and age?
For the following data set, indicate whether the shape of the distribution is normal, positively skewed, or negatively skewed. Provide evidence for your answer by calculating the mean, mode, and median.
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
A quality control inspector selects a part to be tested. The part is then declared acceptable, repairable, or scrapped. Then another part is tested. List the possible outcomes of this experiment regarding two parts.
A particular fast food restaurant is located near a University. 40% of the customers are students. Students prefer the spicier items.
Define null and alternative hypothesis and, using sample info. Test manufacturer's claim at 0.01 (1%) level of significance.
Assume that you have a binomial experiment with p = 0.5 and a sample size of 100. The expected value of this distribution is.
Can you can tell the difference between coke and pepsi in a blind taste test? Most people say they can and have a preference for one brand or another.
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