HW3_su2010 - Sociology 210 Summer 2010 Assignment 3(Due...

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Sociology 210 Summer 2010 Assignment 3 (Due Friday, July 23 at beginning of lecture) 1. (From Frankfort-Nachmias and Leon-Guerrero, 2002) For each of the following situations determine whether a one- or two-tailed hypothesis is appropriate. Also state the null and research hypotheses. Finally, assume that each researcher has set α < .05 and has computed a test statistic of Z = 1.8 (meaning that the sample mean is 1.8 standard error units above the population mean. What can you conclude about each researcher's hypothesis (reject or fail to reject H 0 and what does this mean for the researcher's hypothesis)? Do not need to compute z, z is given to you. Task is to figure out from text do you have a 1 or a 2 tialed hypotheses, state the null and alternative hypothesis. We’re assuming researcher as alpha of .05. z= 1.8. we can reject or fail reject and what does it mean for researchers hypothesis a. Researcher A is interested in finding out if the average income of elementary school teachers is different from the national average income for adults.
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