1) L'altezza degli studenti in una classe è un esempio di variabile... a) Quantitativa discreta b) Qualitativa c) Quantitativa continua 2) Which of these is an example of primary data? a) Data collected from BBC website b) Data collected by asking questions at supermarket c) Data collected from a book d) Data collected from another person 3) 10 goldfish in a pond are marked and tagged. They are released and second sample of goldfish collected. Out of 30, 5 were marked. Estimate number of goldfish in pond. a) 6 b) 20 c) 60 d) 1500 4) Find an estimate of the mean. What extra pieces of information is required? a) Midpoint b) f column c) fx column d) midpoint + fx column 5) For an outlier to exist, the IQR is multiplied by what value? a) 1.2 b) 1.5 c) 1.6 d) 2.5 6) Where would the LQ and UQ be for 120 pieces of data? a) 60 and 90 b) 30 and 90 c) 30 and 60 d) 60 and 120 7) The following box plot is an example of what type of skew? a) Negative b) Positive c) Symmetrical d) Increasing 8) How do you calculate the frequency density? a) Class width x frequency b) Class width / frequency c) Frequency / class width d) Frequency x class width 9) Vicky scores 46 marks in an exam. The mean mark is 50 and the s.d is 2. Calculate her standardised score. a) 2 b) -2 c) 3 d) -3 10) Calculate the first four point moving average. 14, 10, 2, 6 a) 12 b) 8 c) 5 d) 10 11) The probability of it raining is 0.4. The probability of high attendance is 0.2. Find probability of it raining and there being high attendance. a) 0.6 b) 0.2 c) 0.8 d) 0.08 12) What percentage of observations lie within +/- 2 standard deviations? a) 47.5% b) 95% c) 99.8% 13) John plays a game on his computer. He either wins or loses. Name the probability distribution that would model the number of games he wins. a) Discrete Uniform b) Poisson c) Binomial d) Normal

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