ISDS 2000 Chapter : Chapter 10 Outline Updated 0810
15 Mar 2019
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Chapter 10: two-sample tests: section 10. 1: comparing means of. Two independent samples: introduction: in chapter 9, we looked at data randomly selected from one population (one sample) and hypothesized about what value the population mean ( ) may take. 2: as in the one sample case, here. 1 are rarely known; therefore and we must replace with respectively. 2, are equal, then: the pooled-variance t-test statistic is t = 2: the t-test statistic in this case follows a t-distribution with n1 + n2 2 degrees of freedom, example: data on gender and. Hrs worked were collected from the isds 2000 section 3 fall 2003. Suppose you want to conduct a statistical test to determine if data support the idea that the populations of female and male students work different number of hours. Female=group 1 and male=group 2: h0: 1 = 2. H1: 1 2: descriptive statistics (hrs.
