Repeated results in scientific reporting, HR Management

Assignment Help:

Repeated Results

If investigations yield identical results in identical conditions, then the results may be accepted as valid. To put it in other words, the validity of results involves obtaining repeated readings of an experimental procedure. The number of readings taken also affects the accuracy of the results, as you will see a little later. Remember that the requirement for repeated results demands that your measuring technique is repeatable too, i.e., your technique would produce identical results when identical quantities are measured.

Mean Value

If you consider the arithmetic mean, x¯, of results for n measurements, of x, i.e., X1, x2 ........... xn, then:

x¯ = x1 +x2+ x3+ ... xn/n

You can soon see that the greater number of readings (for large value of n), the more accurate will be the result for x. So it is important that repeated results are obtained, although the number of repetitions must be appropriate. It would be appropriate in the case of the pipette calibration experiment to repeat the readings, say, ten times when the final result has only to be within k0.03 cm3 of 25.00 cm3.

Standard Deviation

Standard deviation (SD) is the average amount by which results deviate from the mean value. SD simply gives an indication of how much the data is spread. Arithmetically, SD a,,i-s, fo und as follows:

2315_mean value 1.png

Where x¯ = mean value

and n = total number of results of x.

Most scientific calculators now-a-days have an SD function built in. s, is the symbol used for the SD of large number of results; i.e., hundreds or more. sn-1 is used for a few results - and this is the one you should use.


Related Discussions:- Repeated results in scientific reporting

human resource practices, Investigate the approach that Cisco Systems has ...

Investigate the approach that Cisco Systems has used in its many successful acquisitions. What are some of the human resource practices that have made its acquisitions successful.

Define the items that an agenda contain, Define the Items that an agenda Co...

Define the Items that an agenda Contain? -An agenda contains the following items: ITEM EXPLANATION Date, time and venue of

Human resource at leah''s bakery, what are some possible causes of the high...

what are some possible causes of the high turnover leah''s bakery is experiencing?

Classify project team to minimise destructive effect, Conflict and stress a...

Conflict and stress arise obviously in IS project teams. Many people argue that a little of both is helpful, but everyone agrees about too much is destructive. How could you classi

How important is motivation at work, Question 1: (a) Organisational Be...

Question 1: (a) Organisational Behaviour is basically concerned with the study of human behaviour at work and with finding ways by which employee performance and productivity

Explain the term performance appraisal, Problem 1: (a) Fully explain th...

Problem 1: (a) Fully explain the term "Performance Appraisal"? (b) What are the errors that might occur during the performance appraisal process. Problem 2: Write sh

Caselet, What action should be taken by various functional managers to meet...

What action should be taken by various functional managers to meet the scheduled dates?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd