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MATH 1280-01 Introduction to Statistics - AY2025-T5
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For the data set: 5, 10, 15, 20, calculate the standard deviation.
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Two events are said to be mutually exclusive if ___________.
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Given the following ordered dataset: 10, 15, 20, 25, 35, 40, 45, 50, find the 90th percentile.
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In a survey, 50 people prefer tea, 40 prefer coffee, and 10 prefer both. Using a contingency table, what is the probability of choosing someone who prefers only coffee?
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In a time series graph, what typically represents the X-axis?
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Probability is the study of uncertainty and the likelihood of events occurring.
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A spinner has green sections and blue sections. The probability of the spinner landing on green is 2/7. The spinner is spun twice. Using the tree diagram, work out the probability of the spinner landing on green twice.
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The __________ is the likelihood that a specific event will occur.
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A factory recorded the number of defective products per batch: 5 (5 batches), 10 (3 batches), 15 (2 batches). The relative frequency of batches with 10 defective products is:
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In a small village, one bus arrives a day. Complete the tree diagram.
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