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Super Cola Bottles soft drinks labeled "net weight 16 ounces." An overall process average of 16.01 ounces has been found by taking several batches of samples, in which each sample contained 5 bottles. The average range of the process is .25 ounce. Determine the upper and lower control limit for averages in this process. You may need to determine the sample size, and check the appropriate statistic in the table
Use a 0.05 significance level to test the claim that these credit rating are from a population with a mean that is equal to 700.
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
Explain what the coefficient of determination, R^2 (R-squared), measures. How is it related to the sample correlation coefficient?
An experiment consists of selecting a card at random from a 52-card deck. Refer to this experiment and find the probability of the event.
Can researcher conclude that humidity has significant effect on eating behaviour? Use two-tailed test with a = 0.05.
How many departments would they need to survey to achieve this level of accuracy with 95% confidence?
a) Set up the null and alternative hypotheses, and perform the hypothesis test. b) Does the jury selection system appear to be fair?
Use simple exponential smoothing with α = 0.3 to forecast battery sales for February through May. Assume that the forecast for January was for 22 batteries.
So construct a multiple regression model for predicting the crime rate based upon various explanatory variables unemployment rate, median income, education level.
Estimate a test statistic for null hypothesis H0: μ = 30 against two-sided alternative hypothesis H1 : μ ≠ 30, and by plotting this on its reference distribution.
Let us speek where the preceding data are representative of the entire sector of retail sales companiesSuppose the annual profits are more than 6.5 thousand $ every employee.
Which of the following statements is not true of the null hypothesis? A) It is your theory B) It is what you would expect by chance alone C) Assumes things to be equal D) None of the above
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