assigment 1 crib-S07

assigment 1 crib-S07 - Assignment 1 Crib: 6-2 (c) Accuracy...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Assignment 1 Crib: 6-2 (c) Accuracy represents the agreement between a measured value and the true or accepted value. Precision describes the agreement among measurements made in exactly the same way. (d) Random errors result from uncontrolled variables in an experiment while systematic errors are those that can be ascribed to a particular cause and can usually be determined. 6-4 The standard error of a mean, s m , is the standard deviation of the set of data, s, divided by the square root of the number of data in the set, i.e. N s s m / = . The standard error of the mean is nearly always lower than the standard deviation of the data points in a set because N always has a value greater than 1. 6-7 data set A Listing the data from Set A in order of increasing value: x i x i 2 2.5 6.25 3.1 9.61 3.1 9.61 3.3 10.89 3.5 12.25
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Σ x i = 15.5 Σ x i 2 = 48.61 (a) mean: x = 15.5/5 = 3.1 (b) median = 3.1 (c) spread: w = 3.5 – 2.5 = 1.0 (d) standard deviation: () 37 . 0 1 5 5 / 5 . 15 61 . 48 2 = = s 0.4 (e) coefficient of variation: CV = (0.37/3.1) × 100% = 12% 6-9 (b) ( ) 089 . 0 08 . 0 0001 . 0 04 . 0
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 5

assigment 1 crib-S07 - Assignment 1 Crib: 6-2 (c) Accuracy...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online