Designing investigations (Edexcel GCSE Statistics): Flashcards
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Practise the cards
8 cards from this deck
Calculate response rate from 90/150.
Calculate response rate from 90/150.
0.6 or 60%
Which method gets more honest answers for sensitive topics?
Which method gets more honest answers for sensitive topics?
Anonymous questionnaires
Give one main reason to run a pilot survey.
Give one main reason to run a pilot survey.
Estimate response rates and find problems
Choose method for sensitive topic: interview or anonymous?
Choose method for sensitive topic: interview or anonymous?
Anonymous questionnaires increase honesty; interviews add detail
Expect 25% non-response. Need 240 completed. Send how many?
Expect 25% non-response. Need 240 completed. Send how many?
Response rate 0.75; send 240/0.75 = 320 surveys
How many surveys to send for 400 responses if rate = 2/3?
How many surveys to send for 400 responses if rate = 2/3?
Surveys to send = 400 ÷ (2/3) = 600 surveys
Give one change to increase honest responses for sensitive topic
Give one change to increase honest responses for sensitive topic
Use anonymous questionnaires to improve honesty and response
45 completed from 90 in pilot. What's response rate?
45 completed from 90 in pilot. What's response rate?
Response rate = 0.5 or 50%