Checking all the apples piece by piece will be timeconsuming. I know i need to take a stratified sample but im really not sure where to begin. This means that the conditions have been set up and controlled by the researchers in an artificial environment i. Mar 31, 2018 gcse revision video 31 stratified sampling duration. Apr 23, 2019 sampling techniques include simple random sampling, systematic sampling, stratified sampling, opportunity sampling and quota sampling. This can be done in various ways for example by simply picking out of a hat or by using a random number generator on a calculator. Corbettmaths videos, worksheets, 5aday and much more. Stratified sampling for gcse maths coursework help.
Alevel maths statistics revision looking at sampling. New gcse statistics edexcel revision guide for the grade. Gcse maths 91 non calculator topic list edexel gcse maths exams procedures. As this method provides greater precision, greater level of accuracy can be achieved even by using small size of samples. Jul 29, 2010 the topic of sampling from the year 9 book of the mathematics enhancement program.
Gcse maths edexcel foundation paper 1 21st may 2019 walkthrough and solutions duration. By separating the population into groups age groups, genders, etc. The corbettmaths video tutorial on stratified sampling. Jenny is carrying out a survey for her gcse mathematics project. He uses a sample of 50 students, stratified by year group and gender. Random sampling random sampling is a method that, in a population, every element has a chance to be included in a sample. Stratified sampling is a method of sampling which selects a sample from each layer of a population, sized according to how big that layer is. Gcse maths revision past papers worksheets online tests. Gcse 91 statistics revision guide revise pearson edexcel gcse 91 statistics revision guide revise pearson edexcel gcse 91 statistics revision guide our revision resources are the smart choice for those revising for pearson edexcel gcse 91 statistics. The examples are quick and concise with exam style questions, go to gcse maths if you need more indepth explanations. Stratified sampling stratum is another word for class, level or grade. Andrew is going to carry out a survey of these students. She takes a random sample of 70 students stratified by year and by gender. Several boxes of apples are undergoing a quality check.
When considering a particular population it is usually advisable to. Sampling is the process of looking at a small selection of peopleobjects from a wider population in order to learn new information about that population. A gcse maths worksheet covering stratified sampling suitable for gcse students sitting the 9 1, alevel maths students revision and some. Groups include age,gender, left handed or right handed and an average reaction time for both hands. Sampling gcserevision, maths, handlingdatastatistics. Stratified sampling is used to select a sample that is representative of different groups. Aug 27, 2012 the corbettmaths video tutorial on stratified sampling. Lesson includes definition and builds the difficulty of examples which my class found.
Introduction and sampling scool, the revision website. Everyday low prices and free delivery on eligible orders. For example, we might want to find out how people are going to vote at the next election. Stratified sampling is a method we can use to make our sample more representative. Gcse maths revision stratified sampling teaching resources. Previous rounding highest lowest practice questions.
Stratified sampling changing the subject of formula even ones with reciprocals. An example will help understand stratified sampling better. Obviously we cant ask everyone in the country, so we ask a sample. Stratified sampling 396, 397 histograms 442, 443 probability from a table 351, 352, 353. What topics are in 2019 gcse ocr maths non calculator edexcel maths exam edexcel maths.
Why and how to use stratified sampling 3 minute maths. Stratified sample where the data sampled is in proportion to the population. Sampling, systematic sampling, stratified sampling and quota sampling. It might be a group of people or it could be simply a group of numbers. It is an easy to use stratified sampling calculator which only requires minum data input. Gcse statistics revision notes collecting data sample this is. Revision aids a variety of revision aids and materials to support exam preparation. Sampling revision maths maths gcse and alevel revision. Data collection and sampling revision cards teachit maths stratified sampling gcse questions parking permits stratified sampling student sheet, notes, slides nuffield foundation. For example, how do you compare your score in a maths mock exam to your. For information about these resources and an index for the whole collect. And thats where these cgp revision question cards come in.
If the groups are of different sizes, the number of items selected from each group will be proportional. A teacher wants a sample of 50 people from a school. Stratified random sampling ensures that no any section of the population are underrepresented or overrepresented. Passing gcse maths significantly increases your career opportunities by helping you gain a place on a college course, apprenticeship or even landing continue reading. There are 95 cards in the pack, covering every key grade 91 edexcel higher topic. Stratified sampling gcse maths revision video duration.
Each one starts off with quick questions to warm you up, followed by harder questions to get your brain into. Stratified sampling worksheet and exam practice qs. This video also includes looking at the difference between a. Taking a few apples from each box to examine is the most convenient way. Sampling alevel maths statistics revision, topics include. Want to download the sampling revision notes in pdf format. Edexcel gcse mathematics linear 1ma0 stratified sampling materials required for examination items included with question papers ruler graduated in centimetres and nil millimetres, protractor, compasses, pen, hb pencil, eraser. The stratified sampling calculator was developed by jacob cons. If i actually pass my maths gcse it will be because of you, thank you. Click here to try the quick test stratified sampling. Free taster packs english ks3 english key stage 4gcse english maths ks3 maths ks4gcse maths ks5 maths science. Stratified sampling gcse maths revision video youtube. When a population is divided up into groups, taking a stratified sample ensures that each group is asked in the correct proportion.
The topic of sampling from the year 9 book of the mathematics enhancement program. Random and stratified sampling questions, worksheets, videos. The revise gcse revision planner helps you to plan and organise your time, stepbystep, throughout your gcse revision. Stratified sampling higher collecting data ccea gcse. Stratified sampling made easy your free online maths tutor. Simple random sampling a selection process where each member of the population has an equal chance of being selected. Stratified sampling for gcse maths coursework help hello all, the data i am using was collected online using a reaction timmer game. Stratified sampling questions worksheets and revision mme. Taking a few apples from each box to examine is the most read more sampling statistics. To do this, you might ask 500 people from the uk how many books they finished last year this is a sample. Buy new gcse statistics edexcel revision guide for the grade 91 course with online edition cgp gcse statistics 91 revision by cgp books, cgp books isbn.
Gcse grade boundaries leaks grade boundaries for edexcel gcse maths november 2019 foundation. For example, suppose you want to know about reading habits in the uk. If you really want to make sure you know gcse maths, reading through your study notes just isnt enough youll need to test yourself. Topics include populations, census, sample surveys, sampling units, sampling frames, random sampling, systematic sampling, stratified sampling and quota sampling. Stratified sampling is when the population can be classified into groups or strata. Sampling basically means selecting peopleobjects from a population in order to test the population for something. A useful revision guide to the different methods of collecting data, such as tallying, questionnaires, grouping, stratifiedrandom sampling, for gcse maths. Gcse revision video 31 stratified sampling duration. Use this book and wall chart to mastermind your revision. Work out the number of year girls that should be in the sample. Maths revision video and notes on the topic of stratified sampling. The examples are quick and concise with exam style questions, go to gcse maths if. Mathematics linear 1ma0 stratified sampling 3 minute maths. Stratified random sampling requires more administrative works as compared with simple.
Sampling techniques include simple random sampling, systematic sampling, stratified sampling, opportunity sampling and quota sampling. Stratified sampling male 399 252 female 602 198 the table gives information about the numbers of students in the two years of a college course. Complete stratified sampling lesson made for my year 10, top set, gcse class. Samples are then pulled from these strata, and analysis is performed to make inferences about the greater population of interest. Random and stratified sampling this lesson can be used for revision for the higher maths gcse.
Lesson includes definition and builds the difficulty of examples which my class found insightful. If the groups are of different sizes, the number of items selected from. This is a website which cointains a stratified sampling calculator to save you time from having to do the maths. Stratified sampling is a sampling technique that preserves the given strata proportions. Stratified sampling 1 stratified sampling can be used when the population can be split into distinct groups. Organise prepare revise pearson edexcel gcse 91 statistics. She uses a stratified sample of 60 students according to year group. A worksheet and exam style practice questions covering gcse stratified sampling. Gcse revision video 31 stratified sampling youtube. The population is classified by age as shown in the table below. However, it is important that a sample is representative of the population. A population is a group that we want to find information about. Total 662 total 220 162 382 country number of stamps france germany spain 8 italy 95 245 184 chris takes a sample of 50 stamps stratified by country. A useful revision guide to the different methods of collecting data, such as tallying, questionnaires, grouping, stratified random sampling, for gcse maths.
The concept of having a representative leads to random sampling. New grade 91 gcse maths edexcel revision question cards higher. Work out the number of students in the sample who arc malc and in the first. Stratified sampling practice questions corbettmaths. Random and stratified sampling questions, worksheets. Stratified sampling higher collecting data gcse maths revision. Data stratified sampling the table shows information about chris collection of 662 stamps. See more ideas about gcse math, math and gcse revision. A sample is a method of survey that takes a representative of the population. Stratified random sampling is a method of sampling that involves the division of a population into smaller groups known as strata. Sampling mathematics alevel revision revision maths. If the groups are of different sizes, the number of items selected from each. Calculate the number of people that should be sampled from each age. New grade 91 gcse maths edexcel revision question cards.
733 880 630 802 200 6 646 803 290 1119 296 25 1121 34 964 66 790 218 518 706 117 603 1239 4 1193 873 857 699 865 727 944 145 308 1067 1107 984 1380 995