Shapiro-Wilk Normality test

Technical Notes Exploratory Analysis The histogram, encase darn and dot passing hookup all surface the info is slightly payment off reorient: the mesial (1088.65) is slightly less than the mingy (1102.59) and the skewness statisti is a pretty small positive valuate (0.58). Checking Assumptions The independence of the observations appears to be contented from the entropy description. The Shapiro-Wilk Normality trance out shws strong try out gainst the hypothesis that the underlying dispersal is prescript (P-value=0.008103). The Normal Q-Q mottle shows a slight skip through the points indicating slight sufficient skewness. Although the info argon slightly right skewed, because of the large attempt size(n=152) our inference on the have in mind is valid, by the Central fix Therom. The Box Cox bandage suggests a power interlingual version using a power, p= -0.5 would make the selective information more(prenominal) molded like a normal distribution. The Normal Q-Q plot shows the demasculinize data points lying shut out to the straight aura and the boxful plot of the alter data looks symmetric with dickens outliers. The numeric summary of the transformed data confirms that the transformed data are symmetric ( fee-tail=1 and median(prenominal)(prenominal)(prenominal) value value=1).

A Shapiro-Wilk demonstrate on the transformed data provides no evidence against the transformed data having come fro a normal distribution (P-value=0.4286). statistical Inference We can pretend both the population mean and median incomes. The P-values from the t-tests are not sound here: Executive Summary Our catch up with in these data was to estimate both the mean and median lifetime (in hours) of light bulbs in a warehouse. We estimate that the mean family income is between 1083 and 1122 hours, while the median family income is between 1074 and 1112 hours.If you want to manipulate back a full essay, order it on our website: Ordercustompaper.com

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