I have a question: You intend to estimate a population mean μ with the following sample. 54.7 48.9 56.3 43.5 41.5 41.2 54.2 You believe the population is normally distributed. Find the 99.9% confidence interval. Enter your answer as an open-interval (i.e., parentheses) accurate to twp decimal places (because the sample data are reported accurate to one decimal place). 99.9% C.I. = (35.68,61.54)Incorrect  Answer should be obtained without any preliminary rounding. However, the critical value may be rounded to 3 decimal places.

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.