Survey Sampling Methods and Techniques Explained

Data collection Data collection

Sampling Sampling

1 Martha is the head of a popular perfume brand that has just released a brand new fragrance. She wants to contact a random sample of perfume stores throughout the UK to find out how the latest fragrance is selling. What is the population for her survey? All of the fragrances in the perfume stores All the perfume stores she samples The number of perfume stores she samples All of the perfume stores

2 Jenny wishes to investigate how happy the households in her village are with the local amenities. She wants a sample of 150 households. She has a list of all 2000 households in the village. What is the population for this investigation? The 2000 household in the village The 150 households selected The households located within a mile of Jane s house How happy the households are

3 In which of the following sampling methods does every member of the population have an equal chance of being selected? Opportunity sampling Snowball sampling Simple random sampling Quota sampling

4 A football league has 200 members. The president of the league wants to form a focus group of 10 members to see what improvements could be made. An alphabetical list of all members is available. William suggests the following method of sampling: Number each member on the alphabetical list from 1 to 200 Choose a random number between 1 and 20 Select that member from the alphabetical list Select every 20th name after that State the name of this method of sampling Opportunity sampling Systematic sampling Simple random sampling Stratified sampling

5 Jenny wishes to investigate how happy the households in her village are with the local amenities. She wants a sample of 100 households. She has a list of all 2000 households in the village. Rohan suggests the following selection method: Number the households 0000 to 2000. Obtain 100 different four-digit random numbers between 0000 and 2000 and select the corresponding households for inclusion in the investigation. What is this mentioned sampling method? Opportunity sampling Systematic sampling Simple random sampling Lottery sampling

6 Amar wants to take a systematic sample of size 50 from the 1000 students in his school. He numbers all the students from 0001 to 1000. He chooses the student numbered 0009 as his random starting point. What is the number corresponding to the next student who will be in his sample? 0010 0059 0020 0029

7 Ben is one of a team of people interviewing shoppers in a town centre. He is asked to survey 70 women between the ages of 50 and 60. Identify the name of this type of sampling. Stratified sampling Quota sampling Opportunity sampling Systematic sampling

8 A population list of 4000 items is to be sampled. Every 40th item in the list will be in the sample. How many items will be in this sample? 10 40 400 100

9 A student is given the task of obtaining answers to what students think of the cafeteria food. He stands at the school gate one morning and asks the first 25 students that he sees. What type of sampling method has the student used? Stratified sampling Census Simple random sampling Opportunity sampling

10 Joe wants to estimate the proportion of voters who support the conservative party in a general election. He takes a random sample of ? voters. He finds that the number of voters in this sample who support the candidate is ?. If the size of the population is ?, what is the best estimate for the proportion of voters in the population who support the candidate? ? ? ?? ? ? ?? ?

11 A gym has 800 members. Lauren asks a random sample of 40 members how many times they used the gym last week. Here are her results: Number of times 0 1 2 3 or more Frequency 22 9 5 4 Use Lauren s results to estimate the total number of gym members who used the gym 3 or more times last week. 80 40 60 100

12 A survey is undertaken to find out the most popular political party in Birmingham. The first 2500 available people from Birmingham are surveyed. Identify the name of this type of sampling. Opportunity sampling Stratified sampling Simple random sampling Quota sampling

The large data set (includes a type The large data set (includes a type of data question) of data question)

1 The weather for the 5 UK stations was sampled how many years apart? 25 years apart 18 years apart 28 years apart 27 years apart

2 n/a in any of the cells means No answer Data not available The measuring device was broken for that day(s) 0

3 tr in any of the cells for Daily total rainfall means Torrential (an amount greater than 500mm) Torrential (an amount greater than 500cm) Trace (an amount less than 0.005mm) Trace (an amount less than 0.05mm)

4 How should we treat tr in calculations such as for the mean? 0 0.025 0.05 Just ignore it

5 Daily total sunshine is measured to Tenth of an hour Nearest minute Nearest 5 minutes Nearest tenth of a minute

6 Wind speeds are given in Miles per hour Kilometres per hour Knots Parsecs per second

7 What is an upper bound for cloud cover measured in Oktas? 9 8 7 6 Extra question: How many values are there for cloud cover?

8 The most northern station is Leuchars Jacksonville Hurn Cambourne

9 The weather station closest to the equator is Perth Jacksonville Leeming Cambourne

10 Cardinal direction is an example of Continuous data Quantitative data Bivariate data Qualitative data