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A basic introduction to sampling techniques in statistics, including definitions of key terms like population, sample, parameter, and statistic. It also includes several exercises that illustrate the application of different sampling methods, such as simple random sampling, stratified sampling, and cluster sampling. Suitable for introductory statistics courses or for anyone interested in learning about sampling techniques.
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Population - Is the particular group of interest in a study? Data - Information collected for a study Census - Gathering data from every member of a particular group of interest Parameter - Is a numerical description of a particular population characteristic Sample - a subset of the population sample statistic - a numerical measure that describes an aspect of a sample random sample - a sample in which every element in the population has an equal chance of being selected stratified sample - the population is divided into subgroups called strata and a random sample is taken from each stratum that share, similar characteristics like age age,gender to, ethnicity cluster sample - One chosen by dividing the population into groups, call clusters that are each similar to the entire proportion researchers, then randomly selects some of the clusters the simple consist of the data collected from every member of the cluster selected systematic sampling - One chosen by selecting every nth member of the population convenience sample - One in which the sample is CONVENIENT to select. It is so named because it is convenient for the researcher. Describe which study is population parameter - In 2001, 78% of children down I asked with cancer were in remission after five years and this number is improving Describe which study uses simple statistic - Lakeside family dentist reported that six of the 15 patients who came in for the regular cleaning one day had at least one cavity A local news agency is interested in studying unemployment rates across the state. The researcher will rain in the line select 1000 people from each state and gather all the relevant data from those selected What is this - Stratified In 1960s a poem of 2617 homeowners and the United States result in a report that the average price of a home in the US was 18,500 which is the same - Population US home owners sample 2617 homeowners polled population perimeter $185,
An EPA contractor needs to test the concentrations of a substance and 10 samples of the ground water they are 10 districts in the region to be tested each with several testing sites that this district have barely qualifies, such as individual water, usage, and population size - Stratified A politician want to survey his contestants on key issues his voting district contains five neighborhoods of general different ages at sixes and incomes the issue affects all voters and no single neighborhood contains a representative sample of the district - Stratified Simple Statistics - 1000 of the 1883 participants in the last year Iron Man in Kona Hawaii were interviewed 68% of that interviewed said they became interested in triathlons after first completing and marathons population parameter - The average finish time for our man KO in a was 11: 30 to 4 than 1883 finishers with an average swim time of one: 14 and average bike time of five: 53 in an average runtime of 4: Identify the population, the sample, and any population parameter, or sample statistics in the given scenario Of the 1689 people in the US survey by fit and healthy magazine, 826 reported being self conscience about the white - Population US; sample 1689 people surveyed; simple statistics 826 A soda bottling company will test a random sample of 100 bottles on the production line to assure that the product meets the quality standers - Random