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MATH 1280-01 Introduction to Statistics - AY2025-T5
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A class of students was asked how many books they read in a month: 0, 1, 2, 3, 2, 1, 0, 2. In a frequency table, the frequency for the value 2 is:
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A Time series graph is the most suitable for visualizing data such as monthly sales over a year.
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A test score of 85 corresponds to the 75th percentile in a normal distribution. What does this mean?
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A normal distribution has µ = 70 and σ = 12. What value of X corresponds to Z = -1?
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As the sample size gets larger, the standard error of the sampling distribution of the sample mean gets larger as well.
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For a population with μx=50 and σx=12, if a sample of 100 is drawn, what is the probability that the sum of the sample values exceeds 5200?
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For a population with mean (μ) of 30 and standard deviation (σ) of 5, the mean of the sum of the sample values (ΣX) for a sample size of 50 is __.
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The Central Limit Theorem is primarily used to:
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A large union wants to estimate the mean monthly hours members are absent. They randomly sampled 468 members and recorded their absences for one month. Which of the following should be used to estimate the parameter of interest for this problem?
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Which of the following conditions typically increases the applicability of the Central Limit Theorem?
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