The article "magma interaction processes inferred from fe-ti oxide compositions in the dolek and saricicek plutons, easter turkey (o, karsli, f. aydin, et a, turkish journal of earth sciences, 2008: 297-315) presents chemical compositions (in weight-percent) for several rock specimens. fourteen specimens of limenite grain had an average iron oxide (fe203) content of 9.30 with a standard deviation of 2.71. and seven specimens of limenite lamella had an average iron oxide content of 9.47 with a standard deviation of 2.22 1). can you conclude that the mean iron oxide content differs between limenite grain and limenite lamella? select the most appropriate null hypothesis for answering this question.
2). compute the absolute value of the test statistic. round your answer to two decimal places.
3). compute the p-value. which of the following numbers is closest to the p-value? 0.001, 0.01, 0.1, 0.2, 0.3
4). the data provide sufficient evidence, at the 0.01 level of statistical significance, to conclude that the mean iron oxide content differs between limenite grain and mimenite lamella. true or false?