1. From a recent census in a particular residential area it was found that 95% of...

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1. From a recent census in a particular residential area it was found that 95% of residents had English as their main language and 30% of the population were under 18 years old. The local library wants to explore this issue and decides to create a sample of 200 people. (a) In a stratified sample, how many of the 200 people should be 18 years old or over and have a main language that is not English? (b) Describe one difficulty of creating a stratified sample. (c) Describe why a quota sample might be preferable to a stratified sample. [1] [1] [2] 1. From a recent census in a particular residential area it was found that 95% of residents had English as their main language and 30% of the population were under 18 years old. The local library wants to explore this issue and decides to create a sample of 200 people. (a) In a stratified sample, how many of the 200 people should be 18 years old or over and have a main language that is not English? (b) Describe one difficulty of creating a stratified sample. (c) Describe why a quota sample might be preferable to a stratified sample. [1] [1] [2]

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a In a stratified sample the proportion of each subgroup in the sample should be proportional to their representation in the population In this case 3... View the full answer