Lecture 1 - Elements Epidem - Variables - stats Quiz PDF
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Uploaded by PunctualJasper9346
University of Bologna
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This document contains multiple-choice questions on statistical concepts, including measures of central tendency, like mean and median. It also covers various sampling techniques and other statistical analysis ideas. The practice questions should help students solidify their understanding of these topics.
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🙂: Generate multiple-choice questions 🤖 Smallpdf.com: Questions: 1. What is the formula for calculating the arithmetic mean? A. Sum of all values divided by the number of values B. Largest value minus smallest value C. Middle value when data is ordered D. Most frequent value in the datase...
🙂: Generate multiple-choice questions 🤖 Smallpdf.com: Questions: 1. What is the formula for calculating the arithmetic mean? A. Sum of all values divided by the number of values B. Largest value minus smallest value C. Middle value when data is ordered D. Most frequent value in the dataset 2. What type of sampling ensures that every individual in the population has an equal chance of being chosen? A. Stratified Sampling B. Simple Random Sampling C. Systematic Sampling D. Cluster Sampling 3. What is the standard deviation for a sample calculated with? A. N B. N-1 C. N+1 D. N/2 4. Which measure of central tendency represents the most frequent value in a dataset? A. Mean B. Median C. Mode D. Range 5. What is the classification scale that includes classes that are only named? A. Ordinal B. Nominal C. Interval D. Ratio Answers: 1. A 2. B 3. B 4. C 5. B 🙂: Make the questions harder 🤖 Smallpdf.com: Questions: 1. In the context of measures of central tendency, what does the median represent? A. The sum of all values divided by the number of values B. The middle value when the data is ordered from least to greatest C. The most frequent value in the dataset D. The difference between the largest and smallest values 2. Which of the following statements about the standard deviation is true? A. It is the square root of the mean B. It is calculated using N as the denominator for samples C. It measures the average distance of each data point from the mean D. It is always larger than the variance 3. What is a key principle of a classification scale? A. It must include only the most important observations B. Each observation must belong to only one category C. It can have overlapping categories D. It should exclude extreme values 4. In stratified sampling, what is the purpose of dividing the population into groups? A. To ensure that every individual has an equal chance of selection B. To represent different segments of the population adequately C. To simplify the data collection process D. To eliminate the need for random selection 5. What is the range in a dataset? A. The average of all values B. The difference between the largest and smallest values C. The most common value in the dataset D. The middle value when the data is ordered Answers: 1. B 2. C 3. B 4. B 5. B 🙂: Make the questions harder 🤖 Smallpdf.com: Questions: 1. In the context of measures of central tendency, what does the median represent? A. The sum of all values divided by the number of values B. The middle value when the data is ordered from least to greatest C. The most frequent value in the dataset D. The difference between the largest and smallest values 2. Which sampling method divides the population into groups and selects random samples from each group? A. Simple Random Sampling B. Stratified Sampling C. Systematic Sampling D. Cluster Sampling 3. What is the primary characteristic of a nominal classification scale? A. Classes are named and ordered B. Classes are only named C. Classes have measurable distances between values D. Classes are ranked based on frequency 4. What is the effect of extreme values on the range of a dataset? A. It has no effect B. It makes the range more stable C. It can significantly increase the range D. It decreases the range 5. When calculating the standard deviation for a sample, what is the denominator used? A. N B. N-1 C. N+1 D. N/2 Answers: 1. B 2. B 3. B 4. C 5. B 🙂: Make the questions harder 🤖 Smallpdf.com: Questions: 1. In the context of measures of central tendency, what does the median represent? A. The sum of all values divided by the number of values B. The middle value when the data is ordered from least to greatest C. The most frequent value in the dataset D. The difference between the largest and smallest values 2. Which classification scale includes classes that are named, ordered, and have measurable distances between values? A. Nominal B. Ordinal C. Interval D. Ratio 3. What is the primary purpose of stratified sampling? A. To ensure equal chance of selection for all individuals B. To divide the population into groups and select random samples from each C. To select individuals based on convenience D. To analyze the variance within a single group 4. What is the effect of extreme values on the mean of a sample? A. It has no effect on the mean B. It can significantly influence the mean C. It makes the mean more stable D. It is always less than the median 5. What is the formula for calculating the standard deviation of a sample? A. σ = √(variance) B. s = √(Σ(xi - x̄)² / n) C. s = Σ(xi - μ) / N D. σ = Σ(xi - x̄)² / N-1 Answers: 1. B 2. C 3. B 4. B 5. B 🙂: Generate more multiple-choice questions 🤖 Smallpdf.com: Questions: Answers: 🙂: Make the questions harder 🤖 Smallpdf.com: Questions: Answers:
