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The proportion of defective items generated by a manufacturing process is believed to be 8%. In constructing a p-chart for the process, determine how large the sample size should be to avoid ending up with a negative lower control limit.
20% of their income tax returns are audited. Of five randomly chosen individuals, what is the probability that none will have their returns audited?
A southern state has an unemployment rate of 6%. The state conducts monthly surveys in order to track the unemployment rate. In a recent month, a random sample of 700 people showed that 35 were unemployed.
assume that a procedure yields a binomial distribution with a trial repeated n times. use a binomial probabilities
question 1current weekly demand forecast for an item follows a normal distribution with a mean of 100 units with a
How is the presence of heteroscedasticity tested and How can heteroscedasticity be corrected and Regress C on Yd for the entire sample and test for heteroscedasticity.
A sample of 36 packages reveals the mean weight to be 3.01 pounds, with a standard deviation of 0.03 pounds. Determine a 95 percent confidence interval for the population mean.
information about a regression analysis includes an intercept of 5.99 and a slope of 0. make a prediction of y based on
1. What is meant by time-series data? Give an example. 2. Explain the difference between time-series data and cross-sectional data. Are these two types of data sets mutually exclusive? What do they have in common? How do they differ?
Calculate the descriptive statistics from the data and display in a table. Be sure to comment on the central tendency, variability and shape for each variable.
question the proportion of successes in a random sample of 400 was calculated as 50.a. estimate the population
a 2012 gallup poll surveyed americans about their employment status and whether or not they have diabetes. the survey
give a 95 confidence interval for the mean blood phosphorus level for 5.4 5.2 2.5 4.9 5.7 and 6.3 mgdl. also what
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