By Larry Stephens

ISBN-10: 0071432426

ISBN-13: 9780071432429

What firstly me during this ebook used to be its promise to teach the reader tips on how to use Excel for statistical research. during this admire, the booklet didn't disappoint. What did disappoint, besides the fact that, used to be how little complex statistical research one could do with Excel. if you are new to stats as i used to be, this can come as a shock. when you think Excel is nearly as good because it will get for statistical research, good, you are flawed. that is the place the booklet veers into Minitab.

Minitab is natural statistical software program. It appears to be like much like Excel, yet is far extra strong the place statistical research is anxious. a good way to do complicated information, then you definately have to put money into whatever like Minitab. There are different recommendations, corresponding to R, SAS, Matlab, and so on. yet this e-book chooses to target Minitab, most likely due to its everyday interface and comparatively low buy expense ($100).

I went forward and took the plunge and acquired a replica of Minitab. This determination made the e-book even more helpful to me. As you get deeper into the e-book, some of the varied research forms can simply be performed (easily) with really expert software program resembling Minitab.

I accomplished the examples and workouts from begin to end and located the e-book to be very academic. You perform the research, why you will are looking to do it, and the way to interpret the implications. What you don't get is mathematical justification for the research ideas. whereas this may be great to have, i will see the way it might heavily sidetrack the focal point of this ebook (and triple its size). which will understand, say, why a number of Regression works or the speculation at the back of ANOVA tables, then purchase a textbook or return to varsity. but when you need to easily tips on how to practice statistical research utilizing Minitab and Excel, it is a nice booklet to begin with.

One complaint/suggestion: it'd be great if the writer supplied a better half website for the publication the place the reader may well obtain the instance and workout facts units. on the way to stick with besides an instance or practice an workout, you need to manually input the information. To his credits, the writer retains lots of the info units small and achievable, yet there are a couple of which are too unwieldy for guide access. that is the reason for four stars rather than 5.

A ultimate remark: i purchased this ebook in the summertime of 2008 to paintings via in instruction for beginning a graduate software in facts. I had no delusions it should placed me sooner than my classmates or provide me an side. i used to be simply trying to find a few publicity to complicated themes. After my first semester, within which I typically studied linear types, I revisted the e-book and located it to be much more worthwhile. the place my graduate institution periods thinking about mathematical motivation of study, this ebook is ready software and interpretation of study. Re-reading it after a few graduate paintings helped pull jointly a few of the significant subject matters of statistical research and gave a lot wanted that means and context to what I had simply learned.

If you are interested by complicated statistical research and prepared to drop $100 on Minitab, then I hugely suggest this ebook.

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014 The output tells us the following. Thirty three point five percent of the female sample visited a chat room and twenty two point five percent of the male sample did so. The estimated difference in the population proportions is 11%. 73%. 47. 47 is found and its value is doubled. This is the p-value. 05 level. We conclude that a greater percentage of females visit a chat room. 1-5 Comparing Two Population Variances Purpose of the test: The purpose of the test is to determine whether there is equal variability in two populations.

092 (a) (b) What is the null and the research hypothesis? 05 and why, using the confidence interval method? 05 and why, using the classical method? 05 and why, using the p-value method? (e) Is the sample large enough for the normal approximation to be valid? 11. A sample of monthly returns on a portfolio of stocks, bonds, and other investments is given in Table I-6. Find a 95% confidence interval on . Introduction 28 Table I-6 2500 1870 2250 1990 2350 2400 2130 1980 2340 2550 After looking over the following Excel output, give your answer.

17. Fig. I-23. Introduction 30 18. Fig. I-24. 19. Fig. I-25. Introduction 31 I-7 Introduction Summary LARGE SAMPLE INFERENCES ABOUT A SINGLE MEAN ‘‘Large sample,’’ when making inferences about a single population mean, is taken to mean that the sample size n > 30. The sample mean, x , is a point estimate or a single numerical estimate for the population mean, . The interval estimate is a better estimate because it gives the reliability associatedpwith ffiffiffi the estimate. A (1 À ) confidence interval estimate for  is (x Æ z =2 s= n ).

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