b:head_first_statistics:estimating_populations_and_samples
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| b:head_first_statistics:estimating_populations_and_samples [2025/10/08 12:18] – [Estimating proportion] hkimscil | b:head_first_statistics:estimating_populations_and_samples [2025/10/08 12:20] (current) – [Sampling distribution of sample mean] hkimscil | ||
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| ===== Exercise ===== | ===== Exercise ===== | ||
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| 25% of the gumball population are red. What’s the probability that in a box of 100 gumballs, at least 40% will be red? We’ll guide you through the steps. | 25% of the gumball population are red. What’s the probability that in a box of 100 gumballs, at least 40% will be red? We’ll guide you through the steps. | ||
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| ====== Sampling distribution of sample mean ====== | ====== Sampling distribution of sample mean ====== | ||
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| According to Mighty Gumball’s statistics for the population, the mean number of gumballs in each packet is 10, and the variance is 1. The trouble is they’ve had a complaint. One of their most faithful customers bought 30 packets of gumballs, and he found that the average number of gumballs per packet in his sample is only 8.5. | According to Mighty Gumball’s statistics for the population, the mean number of gumballs in each packet is 10, and the variance is 1. The trouble is they’ve had a complaint. One of their most faithful customers bought 30 packets of gumballs, and he found that the average number of gumballs per packet in his sample is only 8.5. | ||
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| ===== Exercise ===== | ===== Exercise ===== | ||
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| Let’s apply this to Mighty Gumball’s problem. | Let’s apply this to Mighty Gumball’s problem. | ||
b/head_first_statistics/estimating_populations_and_samples.1759893527.txt.gz · Last modified: by hkimscil