Chapter 1, Problem 1.60P

(a)

Interpretation Introduction

Interpretation:

Average density of lead that is determined by overall class has to be calculated and also the percentage error in the average density of each group has to be calculated.

Concept Introduction:

Accuracy can be measured using percentage error.  Percentage error is the difference between the average experimental values and/or true value, divided by true value, multiplied by $100$.  This can be represented in form of equation as shown below.

    $\text{Percentage}\text{error}=\frac{\text{average}\text{value}-\text{true}\text{value}}{\text{true}\text{value}}\times 100$

(b)

Interpretation Introduction

Interpretation:

Precision and accuracy of the overall class data has to be commented.

Concept Introduction:

Precision of the quantities that are measured use the significant figures to express the result.  Precision tells about the closeness of values to each other in a measurement.

Accuracy is a state that tells about the result obtained from experiment corresponds to the actual value or true value.