30207 - Statistics
110 - Escuela de Ingeniería y Arquitectura
326 - Escuela Universitaria Politécnica de Teruel
439 - Bachelor's Degree in Informatics Engineering
443 - Bachelor's Degree in Informatics Engineering
Basic Education
5.1. Methodological overview
The proposed methodology aims at encouraging students for every day work. The student's interest is promoted by means of a practical approach based on the use of actual problems and data.
The general principles of this course are presented in large-group-sessions where a fomal description is carried out with applications in standard examples this classes are complemented with real problem classes in small groups. Classes in computer room deal with both data analysis and modelling of real events. Students completing them will be able to use specific statistical software.
5.2. Learning tasks
This course comprises three learning blocks:
Block 1: Explanatory Data Analysus
Block 2: Probability models
Block 3: Statistical inference
5.3. Syllabus
BLOCK 1: EXPLORATORY DATA ANALYSIS
1. Descriptive statistics for one variable: descriptive measures (location, dispersión, skewness and kurtosis) and univariate graphs.
2. Model checking: Percentiles and probability plots.
3. Descriptive statistics for several variables: association measures, correlation coefficient, smoothing and fitting simple regression lines to data.
BLOCK 2: PROBABILITY MODELS
1. Introduction to probability: Random experiments. Sample space and events. The axioms of probability. Consequences. Conditional probability. Partition of the sample space. Total probability rule and Bayes formula. Independence of two events. Mutually independent events.
2. Random variables and characteristics: Definition of random variable: discrete and continuous. Distribution function. Probability mass function. Discrete random variable. Continuous random variable: density function. Conditional distribution. Expected value of a random variable. Expected value of a function of a random variable. Properties of the expected value. Variance and its properties. Standard deviation. Skewness and kurtosis. Percentile. Probability bounds: Chebyshev's inequality.
3. Main probability models: Sampling with and without replacement. Hypergeometric distribution. Bernoulli process: Bernoulli, binomial, geometric and negative binomial distributions. Poisson process: Poisson, exponential and gamma distribution. Uniform and normal distributions.
4. Multivariate random variables. Joint, marginal and conditional distributions. Conditional expected value. Independent variables. Reproductive property of a sum of variables.
BLOCK 3: STATISTICAL INFERENCE
1. Random sampling: Likelihood function. Statistics. Sampling distribution. Chi-squared, t-Student and F-Snedecor distributions. Central limit theorem. Fisher theorem. Computation of the random sample size.
2. Point estimation and confidence intervals: Unbiased estimators. Variance of a Point Estimator. Standard Error. Methods of point estimation, method of moments and maximum likekihood. Opyimization in Inference. Confidencei ntervals on the mean, the variance and a population proportion.
3. Tests of hypothesis: Hypothesis testing. Null and alternative hypothesis. One-sided and two-sided hypotheses. Type I and type II errors. Power and sample size. Connection between hypothesis tests and confidence intervals. Tests on the mean, variance and a population proportion. Statistical inference for two samples. Tests on difference in means, on the variances ratio and on two population proportions. Paired t-test. Independence tests. Chi-Squared test.