A technician determines the concentration of calcium in milk using two instrumental methods. If Fcalculated > Ftable for the two sets of calcium data, what conclusion(s) can the technician make? I. The difference in standard deviations for the two instrumental methods is significant. II. The difference in standard deviations for the two instrumental methods is not significant. III. The data come from populations with the same standard deviation. IV. The data do not come from populations with the same standard deviation. II and III O II I and IV I and III II and IV

How would you calculate Standard Deviation?

An ore sample was analyzed for its Fe content. Student A analyzed the sample a total of six times and her results had a standard deviation of 1.33. The same sample was analyzed five times by Student B and his results had a standard deviation of 3.42. To determine if their standard deviations are similar, they perform an F test. The calculated F value is and the table value of Fis 3 in your book for critical values of F. O 6.61; 7.39 O 6.61; 9.36 O 0.151; 9.36 O 2.57; 7.39 O 6.61; 6.98 Refer to Table 4-

Calculate the sample standard deviation, s, for this set of data: 4.5, 6.7, 4.2, 9.6, 3.4, 8.2 Report your answer to the fourth decimal place.

Calculate the sample standard deviation, s, for this set of data: 1.9, 1.5, 6.0, 2.0, 1.4, 1.2 Report your answer to the fourth decimal place.