The %w/w Na2CO3 in soda ash can be determined by acid-base titration. Analyst A did 6 replicate measurement and received a mean value of 86.84, standard deviation of 0.35. Analyst B did 5 replicate measurement and received a mean value of 86.81, standard deviation of 0.93. Compare the standard deviation of the two results (one-tailed test at 95% confidence level). Which of the statement is correct?

A) F_calculatedis 0.14, F_tableis 5.19, the difference in standard deviation is not significant at 95% confidence level.

B) F_calculatedis 0.14, F_tableis 6.26, the difference in standard deviation is not significant at 95% confidence level.

C) F_calculatedis 7.1, F_tableis 5.19, the difference in standard deviation is significant at 95% confidence level.

D) F_calculatedis 7.1, F_tableis 4.95, the difference in standard deviation is significant at 95% confidence level.