I mostly want to know which words will help me decide to do a t-test or z-test and whether to use x-bar or p-hat.
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well, first of all, p-hat is a proportion and x-bar is the arithmetic mean. \n\nYou always use the z-test for p-hat. If you're having trouble recognzing what a proportion is, think of it as percent. If you say, "15% of the flowers are purple" then the proportion is .15 (which could, for example, be 15/100). p-hat will ALWAYS be a number between 0 and 1.\n\nUse x-bar when you want to the test the mean. It's a little tricky to decide when to use a t-tets for a z-test and you professor might be more strict than others. I've linked a flow chart below which will help you decide when to use a t-test or z-test but here is a summary of the rules (from the website cited below):\n\n\nZ TEST\n\n       data points should be independent from each other\n\n       z-test is preferable when n is greater than 30.\n\n       the distributions should be normal if n is low, if however n>30 the distribution of the data does not have to be normal\n\n       the variances of the samples should be the same (F test) \n\n       all individuals must be selected at random from the population\n\n       all individuals must have equal chance of being selected\n\n       sample sizes should be as equal as possible but some differences are allowed\n\n\n\nT TEST\n\n       data sets should be independent from each other except in the case of the paired-sample t-test\n\n       where n<30 the t-tests should be used\n\n       the distributions should be normal for the equal and unequal variance t-test (K-S test or Shapiro-Wilke)\n\n       the variances of the samples should be the same (F-test) for the equal variance t-test\n\n       all individuals must be selected at random from the population\n\n       all individuals must have equal chance of being selected\n\n       sample sizes should be as equal as possible but some differences are allowed\n\n\n\nKeep in mind that in some case you may ahve to use a weighted t`. If you don't know what that is, you teacher might not have asked you to know that information.\n\nContact me if you need more info.
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problem\ninformation\nhypothosis\nexperiment\nrecording\nconclusion\n\njust remember pi herc (abbreviations) and it will be easy
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Hope these sites help.
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They both test differently... I think both should be used.  hey need to reformat the test to not be gender or ethnically biased but otherwise, combined, they are great tools.
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It's pretty hard to find any sort of tests for free which is what I am assuming you want. If you are willing to pay then there are loads just search on yahoo.com. Whatever you do don't use google like the guy above suggests because google are evil and are trying to take over the world with their never ending quest for knowledge. By using google you are giving them all of your personal details, even what colour underwear you are wearing right now!
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Z-scores are used in presenting raw transforming data into information that is more meaningful.  The formula for the calculation of a z-score is:\n\nZ = (X – X bar) / Standard Deviation (SD)\n\nWhere X and X bar are the limits in the range.  You did not provide the SD or the means of calculating it in your question.  Just plug the info you have into the equation above.
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Testing for weed\nhttp://www.marijuana.org/BeatDrugTesting.htm
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Try the crossword dictionary.
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I'm not sure what chemicals you are talking about.  However, Terminator Gold is what I use when I have to take a p*ss test.  You drink it a couple hours before you go in for the test.  You pee a couple times, then you are good to go.  If it's a hair follicle test there is a certain shampoo you can buy.  You can go to any local head shop and they will tell you what products to get.  My friends and I have all used terminator gold for years and it has worked for all of us.  It's also money back guaranteed.  \n\nOh, and ignore everyone else.  Smoke your brains out if you want.  Pot isn't bad for you, in fact, I think a lot of people would be surprised to find out how many positive effects smoking pot can have.  Good luck, hope you pass!
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Considering the data you had shown,\nyou must use a one-tailed test.\nyour null hypothesis would be:\nHo: There is no significant difference between the mean amount of time devoted to patient care per week by doctors using conventional methods and alternative methods.\nHo: mean(conventional) = mean(alternative)\n\nyour alternative hypothesis must be:\nHa: The mean amount of time devoted to patient care per week by doctors using conventional methods exceeds that of doctors using alternative methods\nHa: mean(conventional) > mean(alternative)\n\nNow that you have the hypotheses, next is to set the level of significance but it's all up to you depending on how confident are that you will not commit any kind of error.\n\nAnd your asking about the appropriate test?\nFor me, the choice depends on the given.\nBut you can only choose from the second and fourth test since you have to use a directional test (one-tailed test).\n\nUse Z-test if the standard deviation or variance of the population is known.\nUse t-test if the standard deviation or variance of the population is unknown.\nThat's the general rule of choosing the appropriate test.\nBut there's another consideration in the selection of test.\nyou must also take into consideration the number of your sample, whether it exceeds 30 or not.\n\nThat's all. I hope I've been a great help to you. Please inform me if there is something wrong with my lecture here.\nthank you.
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Creating Posters Using MS PowerPiontTM\n\nhttp://www.class.uidaho.edu/psych/experiments/xper-help.html
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Try www.txdps.state.tx.us/psb/testing
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PLAB  \n... · gpvts · mrcgp · mrcog · mrcp · mrcpath · mrcpch · mrcs · plab · toefl · usmle ... DM - Gastroenterology DM - Neurology DM Endocrinology DM Nephrology DNB Part 1 ...www.rxpgonline.com/plab.html \nDNB Forums  \n... · gpvts · mrcgp · mrcog · mrcp · mrcpath · mrcpch · mrcs · plab · toefl · usmle ... DM - Gastroenterology DM - Neurology DM Endocrinology DM Nephrology DNB Part 1 ...www.rxpgonline.com/forum29.html
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are u kidding, just use the dam formulas for confidence interval and z scores it is not hard just plug them in
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Psst Psst, in case you didn't notice\nNo one care ;)
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you can buy test strips at wal-mart and read this page it taught me everything I needed to know http://intheswim.com/help/FAQ.aspx
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Lexis-Nexis\nAutotrax (Choicepoint)\n\nThats what I use at work - Govt investigator....