Unit 3- Part B- Data collection, processing and analysis/interpretation

studied byStudied by 0 people
0.0(0)
Get a hint
Hint

What is the meaning of anomalous results?

1 / 30

flashcard set

Earn XP

Description and Tags

This is from the Pearson edexcel Foundation diploma in applied science Book 1

31 Terms

1

What is the meaning of anomalous results?

Results that do not appear to fit the trend in the data

New cards
2

What is it important to do when collecting data?

Take measurements accurately and to the appropriate level of precision

New cards
3

What must you do when reading a volume on a burette or measuring cylinder?

Take the reading at eye level and at the bottom of the meniscus every time, to eliminate human error and make sure your measurements are reliable

<p>Take the reading at eye level and at the bottom of the meniscus every time, to eliminate human error and make sure your measurements are reliable</p>
New cards
4

What should you do to make sure that the data you are collecting is reliable?

Take repeat readings.

New cards
5

What can taking repeated reading also help you identify?

If any results are anomalous

New cards
6

What can you do if you find a result is anomalous?

You can ignore it when plotting a graph of the result or calculating the mean

New cards
7

What is the meaning of quantitative data?

Data which involves using numbers

New cards
8

What is the meaning of mean?

The sum of all the results divided by the number of results

New cards
9

what is the meaning of qualitative data?

Observations made without using numbers

New cards
10

What is standard deviation?

A measure of how far data values are from the mean value

New cards
11

What is the formula for standard deviation?

knowt flashcard image
New cards
12
<p>What does <span><strong>Σ</strong> stand for?</span></p>

What does Σ stand for?

The letter sigma stands for the sum of

New cards
13
<p>What does <span><strong>x̄ </strong>for?</span></p>

What does for?

The mean

New cards
14
<p>What does <strong>n</strong> stand for?</p>

What does n stand for?

The number of data values

New cards
15
<p>What does <strong>X<sub>i</sub></strong> mean?</p>

What does Xi mean?

A particular value

New cards
16

What are the steps towards finding the standard deviation?

  1. Find the mean

  2. Subtract the mean from each of your data values to get the deviations

  3. Square each deviation and add them all up

  4. Divide this figure by one less than your sample number

  5. The standard deviation is the square root of this number

<ol><li><p>Find the mean</p></li><li><p>Subtract the mean from each of your data values to get the deviations</p></li><li><p>Square each deviation and add them all up</p></li><li><p>Divide this figure by one less than your sample number</p></li><li><p>The standard deviation is the square root of this number</p></li></ol><p></p>
New cards
17

What is the meaning of frequency?

How often a particular value occurs in a set of values

New cards
18

Why do we use statistical tests?

To test or support a hypothesis or to see if there is a relationship between two quantities or factors

New cards
19

What does significance level or confidence level (p) mean?

it is a figure used to reject or accept the null hypothesis

New cards
20

What is the meaning of positive correlation?

When x increases, y increases, the line of best fit has a positive slope

<p>When x increases, y increases, the line of best fit has a positive slope</p>
New cards
21

What is the meaning of negative correlation?

When x increases, y decreases ,the line of best fit has a negative slope

<p>When x increases, y decreases ,the <strong>line of best fit</strong> has a negative slope</p>
New cards
22

What is the meaning of the line of best fit?

A straight line or smooth curve drawn to pass through as many data points as possible

New cards
23

What is the meaning of a strong correlation?

When most of the data points are close to the line of best fit

<p>When most of the data points are close to the line of best fit</p>
New cards
24

What is the meaning of a weak correlation?

When the data points are more widely scatters around the line of best fit

<p>When the data points are more widely scatters around the line of best fit</p>
New cards
25

What is percentage error?

The maximum and minim degree of accuracy

New cards
26

How do you measure percentage errror?

knowt flashcard image
New cards
27

What are the different ways of displaying results?

  • results table

  • Frequency table

  • Pie charts

  • bar charts

  • Histograms

  • Line graphs

New cards
28

What are the three types of variables?

  • Categoric

  • Discrete

  • Continous

New cards
29

What does a categoric variable mean?

Data with specific labels such as melting points of the alkali metals or percentages of gases in the air

New cards
30

What does a discrete variable mean?

Whole number data such as the number of prickles on a holly leaf

New cards
31

What does a continuous variable mean?

Data that can be any number for example, the change of temperature of a reaction mixture over time

New cards

Explore top notes

note Note
studied byStudied by 60 people
... ago
5.0(1)
note Note
studied byStudied by 47 people
... ago
5.0(1)
note Note
studied byStudied by 9 people
... ago
5.0(1)
note Note
studied byStudied by 14 people
... ago
5.0(2)
note Note
studied byStudied by 9 people
... ago
5.0(1)
note Note
studied byStudied by 7 people
... ago
5.0(5)
note Note
studied byStudied by 25 people
... ago
5.0(1)
note Note
studied byStudied by 10069 people
... ago
4.7(58)

Explore top flashcards

flashcards Flashcard (100)
studied byStudied by 4 people
... ago
5.0(1)
flashcards Flashcard (24)
studied byStudied by 23 people
... ago
5.0(1)
flashcards Flashcard (26)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (34)
studied byStudied by 4 people
... ago
5.0(2)
flashcards Flashcard (20)
studied byStudied by 5 people
... ago
5.0(1)
flashcards Flashcard (63)
studied byStudied by 1 person
... ago
5.0(1)
flashcards Flashcard (64)
studied byStudied by 6 people
... ago
5.0(1)
flashcards Flashcard (27)
studied byStudied by 1 person
... ago
5.0(1)
robot