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CALCULATE PROPORTION MINITAB EXPRESS MANUAL
Show your manual calculations (you may use Minitab to summarize the sample data).Įxplain whether your test satisfies the underlying assumptions, with reference to graphical evidence.Ĥ. Test at the 0.05 level of significance whether the sample constitutes sufficient evidence to show that the population mean of median incomes now exceeds $24000.
![calculate proportion minitab express calculate proportion minitab express](https://cdn.numerade.com/ask_images/1b6ee439aae343749b5d7bd9611bb080.jpg)
Suppose an earlier census found that the mean of the Toronto median incomes was $24000. The file above also contains a random sample of size 40 (sampleA) from the same population of median incomes. (e) Count the number of intervals out of your twenty, that contain the true value of the population mean from part a. Display the sample data graphically and comment on whether the relevant assumption regarding the population distribution is warranted (state clearly the assumption needed to justify the interval estimation). (d) For the first sample, confirm the Minitab generated interval by calculating the interval manually.
![calculate proportion minitab express calculate proportion minitab express](https://i.ytimg.com/vi/peCH2Gc5YZY/mqdefault.jpg)
Using each sample, use Minitab to calculate a 95% confidence interval estimate for the population mean, assuming you do not know the population standard deviation (this interval estimation can be done in one operation on all twenty columns, but not in Minitab Express). This procedure must be replicated twenty times (note that if you open up the same sampling dialog box each time from the menu, then you only have to replace the last destination column with the next one). (c) Now use Minitab (Calc Menu – Random Data – Sample from Columns) to draw twenty samples of size n = 31 from the Toronto medinc population. Explain if the mean of a random sample of size 31 would have a normal distribution. (b) Examine a boxplot and histogram of the population data. Set aside all population information until part e. (a) Treating this set of data as the population, use Minitab to calculate the population mean for the medinc variable.
![calculate proportion minitab express calculate proportion minitab express](https://www.coursehero.com/thumb/b2/40/b2400be42431f7faa1b9f9b80d83d615ee0f707c_180.jpg)
The file Toronto.mtw contains data on the median incomes (medinc) of census dissemination areas in the Toronto Census Division.