Probability: Experimental Estimates
Quiz by DoodleMaths
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20 questions
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- Q1I suspect a coin of being biased. I toss it 100 times and it lands on heads 13 times. What is the best estimate of the probability of getting a head the next time I toss the coin?¹⁄₁₀¹³⁄₁₀₀¹⁄₂¹⁄₁₃30s
- Q2I drop 200 drawing pins on the floor. 50 land pin-up. What would be the best estimate of the probability of a drawing pin landing pin-up?¹⁄₄0.20.5¹⁄₅₀30s
- Q3I did a survey of 20 people to see how many siblings they had. Based on the results shown, what is the probability that someone chosen at random has no brothers or sisters?⁸⁄₂₀⁵⁄₂₀⁶⁄₂₀¹⁄₂₀30s
- Q4I dropped a piece of toast 1000 times, recording how many times it landed butter-side down. Work out the experimental probability of landing butter-side down at each stage of the experiment:Users link answersLinking30s
- Q5For my toast experiment, which probability is the best estimate?0.65 - this is to 2 decimal places0.6 - 200 trials is plenty0.55 - this is the result from the most trials0.8 - it shows the toast is biased30s
- Q6I toss a coin 100 times and get a head 65 times. This means...the coin is possibly biased but I need to do more trials to be surenext time I will get a tailthe coin is definitely not biasedthe coin is definitely biased30s
- Q7I toss a coin 100 times and get a head 90 times. This means...next time I am likely to get a headnext time I am likely to get a tailgetting a head/tail is equally likelythe coin is not biased30s
- Q8I survey my swimming club about how many pets everyone has. Link the number of pets to their experimental probabilities.Users link answersLinking30s
- Q9For the following events, sort them according to how you would work out the probability of it happening:Users sort answers between categoriesSorting30s
- Q10I drop 100 pencils on the floor. Exactly 41 of them break. As a decimal, what is the best estimate of the probability of a pencil breaking when it is dropped?Users enter free textType an Answer30s
- Q11I observe toads crossing a road. Out of 100, 11 get squashed. This means that the probability of a toad getting across the road safely is 0.89.truefalseTrue or False30s
- Q12I plant 30 orchid seeds. Only 9 of them sprout. Based on this, the probability of an orchid seed sprouting is...0.3330.90.3¹⁄₉30s
- Q13I do a quick survey on my classmates' shoe sizes - the results are shown. What is the experimental probability of a classmate having size 8 shoes?Users enter free textType an Answer30s
- Q14I suspect a dice of being biased. I roll it 60 times and it lands on a six 50 times. What is the best estimate of the probability of getting a six the next time I roll the dice?⁶⁄₅₀⁵⁄₆¹⁄₆₀¹⁄₆30s
- Q15A chocolate factory manager wants to know the probability of one of his chocolate bars being broken. He examines 1000 bars and 9 are broken. Based on his experiment, a good estimate of the probability of a bar being broken is:0.090.00990.930s
