Question 5 3 pts Consider the following data set when answering the next three questions: Sample Density (g/cm) 2.45 2 3.88 1 3 3.92 4 4 3.91 5 2.60 6 3.95 7 3.90 8 3.92 In an attempt to determine the density of typical concrete, measurements were made by a novice on eight (8) different concrete samples. Apply Q test to determine whether the outlying result among the measurements should be retained or rejected at the 95% confidence level (see an appropriate table for Qc values at the 95% confidence level). O Reject Sample 5 O Retain all measurements O Reject Sample 1 Reject all but Samples 3, 4, 7. and 8 Reject Samples 1,5, and 6 Question 2 2 pts In comparing the difference between a student's average experimental measurements of the density of sodium chloride and the known, well-accepted density of this compound, the the student's result can be determined. of absolute uncertainty Q test O accuracy random error O precision Question 3 2 pts of the student's result should be To correct the systematic error in an experiment, the determined O correlation coefficient, O precision o calibration Q test random error Question 4 2 pts of the In calculating the standard deviation given a set of experimental measurements, the result can be assessed. O Q test O absolute uncertainty O accuracy calibration systematic error Question 6 2 pts Taken into account your conclusion in the previous question, calculate the sample average and standard deviation O 3.73 0.5g/cm O 3.57 + 4 g/cm O 3.6 0.6 g/cm O 3.57 + 0.01 g/cm O 3.91 +0.02 g/cm D Question 7 2 pts Published in the Engineering Handbook, the density of normal concrete is 2400 kg/m (i.e., 2.4 g/cm). Describe the accuracy and precision of the novice's original report with all eight samples in the set before Q test is performed. Impossible to determine unless the Engineering Handbook is of an older edition Accurate but not precise O Precise but not accurate O Neither accurate nor precise Both accurate and precise