Question

n 10. A study of iron deficiency among infants compared samples of infants following different feeding regimens. One group contained breast-fed infants and the other group was fed a baby formula with iron supplements. Here are the summary results on blood hemoglobin levels at 12 months of age. Group Sample mean Sample St. Dev. Breast-fed 23 13.3 1.7 Formula 19 12.4 1.8 Does the data provide evidence at the 10% level that the hemoglobin levels differ for these two populations of infants? YOU NEED ONLY STATE YOUR HYPOTHESES FOR THIS QUESTION (and define your parameter(s).) 11. A significance test is done to determine if there is a positive correlation between H:p=0 college GPA and salary for first job. The hypotheses were H:p>0 If the p-value for the test was p=0.001, give the cf.clusion for the significance test. 12. What is ANOVA used for?

Answer 1

VS Answer (10) Let Me My be population mean hemoglobin level in breast: fed infants group and baby formula-fed Infants group respectively The null and alternative hypotheses are Ho! M = M2 , i.e. dhe mecin hemoglobin levels for the two group does not differ significantly Hai Mi 712, ie the mean hemoglobin level for the two group didd eru eignificantly. (11) "The null and alternative hypotheses ay nap all Hope NS Haipz Given that prevalue 0,001 Since povaluu is fan less than any assumed level of significance (sayar 11, 5.1.), so we reject Hout a and conclude that there is sufficient evidence to support the claim that the two variable C) PP 9hd sulary for first job are positively correlated. etc