Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 4: Q28P (page 93)

Set up a spreadsheet to reproduce Figure 4-15. Add error bars: Follow the procedure on pages 87-88. Usesyfor the + and - error.

Short Answer

Expert verified

A spreadsheet similar to Figure 4-15is set up in step 2.

A graph plotted on the spreadsheet by the use of x and y values is shown in step 3.

Step by step solution

01

Error bar to agraph

Error bars on the graphs helps to judge the quality of data and the fit of a curve to the data.

02

Generation of Spreadsheet

Given data:

Use the data from Figure 4-15

Use the procedure from pages 87-88to add error bars.

Use syfor the + and - error

A spreadsheet similar to Figure 4-15 is as shown below.


The above spreadsheet gives the slope, the intercept and its uncertainties, and also the standard uncertainty and standard deviation ofysy

03

Plot the graph

Now, let us plot a graph on the spreadsheet by the use of the x and y values.

The error bars on the points of the graph are drawn with the help of the procedure given in pages 87-88.

The obtained graph with the addition of error bars is shown in Figure 2.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Traces of toxic, man-made hexachlorohexanes in North Sea sediments were extracted by a known process and by two new procedures, and measured by chromatography.

(a) Is the concentration parts per million, parts per billion, or something else?

(b) Is the standard deviation for procedure B significantly different from that of the conventional procedure?

(c) Is the mean concentration found by procedure B significantly different from that of the conventional procedure?

(d) Answer the same two questions as parts (b) and (c) to compare procedure A to the conventional procedure.

Use Table 4-1 to state what fraction of a Gaussian population lies within the following intervals:

(a)μ±σ

(b)μ±2σ

(c)μto+σ

(d)μto+0.5σ

(e)-σto-0.5σ

Here are mass spectrometric signals for methane inH2:

CH4(vol%):00.0620.1220.2450.4860.9711.921Signal(mV):9.147.595.6193.8387.5812.51671.9

(a) Subtract the blank value (9.1) from all other values. Then use the method of least squares to find the slope and intercept and their uncertainties. Construct a calibration curve.

(b) Replicate measurements of an unknown gave 152.1, 154.9, 153.9 and 155.1mV , and a blank gave 8.2,9.4,10.6 and 7.8mV . Subtract the average blank from the average unknown to find the average corrected signal for the unknown.

(c) Find the concentration of the unknown, its standard uncertainty (ux) , and the95%confidence interval.

Hydrocarbons in the cab of an automobile were measured during trips on the New Jersey Turnpike and trips through the Lincoln Tunnel connecting New York and New Jersey. The concentrations ( ±standard deviations) ofm- andp -xylene were

Turnpike:31.4±30.0μg/m3(32measurements)Tunnel:52.9±29.8μg/m3(32measurements)

Do these results differ at the 95%confidence level? At the 99%confidence level?

Use the NORMDIST spreadsheet function to answer these questions about the brakes described in Exercise 4-C:

(a) What fraction of brakes is expected to be 80% worn in less than 45800miles?

(b) What fraction is expected to be 80%worn at a mileage between 60000and 70000miles?
See all solutions

Recommended explanations on Chemistry Textbooks

Kinetics

Read Explanation

Physical Chemistry

Read Explanation

Making Measurements

Read Explanation

Inorganic Chemistry

Read Explanation

Chemistry Branches

Read Explanation

Ionic and Molecular Compounds

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free