A transect is an archaeological study area that is 1/5 mile wide and 1 mile long. A site in a transect is the location of a significant archaeological find. Let x represent the number of sites per transect. In a section of Chaco Canyon, a large number of transects showed that has a population variance o? = 42.3. In a different section of Chaco Canyon, a random sample of 18 transects gave a sample variance s2 = 51.3 for the number of sites per transect. Use a 5% level of significance to test the claim that the variance in the new section is greater than 42.3. (a) What is the level of significance? Shot 10.17 PM State the null and alternate hypotheses. O Hy: 02 = 42.3; H4: 6 + 42.3 #p: a = 42.3; H: < 42.3 Hp: 02 > 42.3; H4; 62 = 42.3 Hp:o? = 42.3; H4:? > 42.3 Shot 9.43 PM (b) Find the value of the chi-square statistic for the sample. (Round your answer to two decimal places.) Shot 8.32 AM What are the degrees of freedom? Shot 2.56 AM What assumptions are you making about the original distribution? We assume a uniform population distribution. We assume a normal population distribution. We assume a exponential population distribution. We assume a binomial population distribution.
