s zsatthe 95% confidence level c) The ecision of See A and Stalent B are not D)
ID: 695135 • Letter: S
Question
s zsatthe 95% confidence level c) The ecision of See A and Stalent B are not D) Theve is tnongh information to compare the 26. A water sample wa snalyned for sodioam uning somic 00 05 1913 30 23 30 s 40 45 5o ss precision of Stadeets A and B no points should be removed with concentrations greater than 3.5 (B) all points prepared by aiding 10.00 ml of the water sample to each volumetric flask, adding an aliquot of standard, and diluting to 100.00 l. What is the concentration of sodium in the undiluted water sample? all points with concentrations greater than 4. all points with concentrations less than 1.3 and greater than 4.0 Use the data provided to answer 23-25 A sodium hydroxide solution was 0.90 0 80 0.70 060 0 50 0.40 potassium hydrogen phthalate (KHP). Two students against Pd four titrations each; their results are tabulated below Student A Sample MNaOH Sample # M NaOH 0.1311 0.1356 0.1333 0.1324 0.1331 0,0019 y-297x +009 -0996 0.1328 0.1309 0.1334 0.1318 0.1322 0.0011 0.20 0.10 0.00 0.20 Average Std. Dev Concentration of Na Standard Added ( Average Std. Dev (A) 3.0 ppm (C) 0.030 ppm B) 0.30 ppm (D) -0.030 ppm 21. Are there any outliers among the trials of student B that can be rejected at the 95% confidence level? (A) Yes, the 0.1311 M trial of Student B should be A technician determines the concentration of a beverage using two different methods. If F 27. discarded at the 95% confidence level for the two caffeine measurements, what conclusions ca technician make? (B) Yes, the 0.1356 M trial of Student B should be (C) Yes, the 0.1311 M and the 0.1356 M trials of (D) No, none of data points can be rejected discarded. The difference between the standard Student B should be discarded. the two methods is significant. The difference between the standard the standari the two methods is not significant. There is more than a 5% chance th IllI from populations with the same p 24. Suppose lcalc-0.80. Are the NaOH concentrations measured by Student A and Student B significantly on. different at the 95% confidence level? (A) No, because tale fable There is less than a 5% chance from populations with the sam IV deviation. (A) I and III (C) 11 and (C) Yes, because (alc fable (D) Yes, because talc IableExplanation / Answer
Multiple choice
22. From the calibration curve, the points which are outliners to be removed are,
(D)
23. From the given data, the point at 95% to be an outliner,
(D)
24. when tcalc = 0.80, the concentrations found by student A and B differ significantly,
(A)
25. no visible clearly
26. concentration of sodium in water sample is,
(B)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.