Unit 2.
%PDF-1.4 %���� age or height). In addition, true ratios exist when the same variable is measured on 2 different members of the population.selected by using chance methods or random numbers.obtained by numbering each subject of the population and then selecting every Kth subject.obtained by dividing the population into groups (called strata) according to some characteristic that is important to the study, then sampling from each group.the population is divided into groups called clusters by some means. Can be used as a rough estimate of variability.defined as the difference between Q1 & Q3, and is the range of the middle 50% of the data.In EDA, data can be organized using a stem & leaf plot.
HOMEWORK ANSWERS. Z = value - mean / standard deviation.found by dividing the distribution into 4 groups, separated by Q1, Q2, & Q3. Get A+ mystatlab answers for any tests from our competent statisticians in QNT 331 and other classes We can handle tasks in week 1, week 2, week3, week 4, week 5, week 6,week 7 … Also called the Outcome Variable.a group, in a study, that receives special instructions, or some type of special treatment.a group in an experimental study that is not given any specific instructions or special treatment.subjects, who knowingly participate in an experimental study, that change their behavior in ways that affect the result of a study.a variable that influences the outcome variable, but was not separated from the independent variable.a claim that attempts to imply a connection between variables that may not actually exist.the organization of raw data in table form, using classes and frequencies.raw data that is placed into a quantitative or qualitative category.the number of data values contained in a specific class.used for data that can be placed into specific categories, such as nominal or ordinal level data.used when the range of the data is large, and must be grouped into classes that are more than one unit in width.represents the smallest data value that can be included in a class.represents the largest data value that can be included in a class.used to separate classes so that there are no gaps in the frequency distribution.this is found, for a class frequency distribution, by subtracting the lower/upper class limit of one class from the lower/upper class limit of the next class.A) classes must be equal in width. Learn. 3) Multiply the IQR by 1.5. Chapter 3 Test.
Learn elementary statistics chapter 3 with free interactive flashcards. Elementary Statistics Ch 1-3 for Test 1. a characteristic or attribute that can assume different values. Describing a situation.consists of generalizing from samples to populations, performing estimations & hypothesis tests, determining relationships among variables, & making predictions.consists of all subjects (human or otherwise) that are being studied.a decision making process for evaluating claims about a population, based on information obtained from samples.Variables that can be placed into distinct categories, according to some characteristic or attribute. The heights of the points determines the frequencies.the sum of the frequencies accumulated on the upper boundary of a class in the distribution.a graph that represents the cumulative frequencies for the classes in a frequency distribution.a graph using proportions instead of raw data as frequencies.represents the data by using vertical or horizontal bars whose heights or lengths represent the frequency of the data.used to represent a frequency distribution for a categorical variable, and the frequencies are displayed by the heights of vertical bars, which are arranged on order from highest to lowest.represents data that occur over a specific period of time.a circle that is divided into sections or wedges according to the percentage of frequencies in each category of the distribution.a data plot that uses part of the data value as the stem and part of the data value as the leaf to form groups or classes.a characteristic or measure obtained by using the data values from a sample.a characteristic or measure obtained by using all the data values from a specific population.Also known as the arithmetic average, the mean is the sum of the values divided by the total number of values.the midpoint of the data array. It consist o…Statistical Significance versus Practical significance: What i…Source of data: In concluding a statistical study, why is it i…Voluntary Response Sample:What is a voluntary response sample,…Correlation and Causation: What is meant by the statement that…Statistical Significance versus Practical significance: What i…Source of data: In concluding a statistical study, why is it i…a frequency table used when the data are categorical (qualitat…quantitative or qualitative category; first column in the freq…the upper and lower values of a class for a grouped frequency…value for a class in a grouped frequency distribution obtained…a frequency table used when the data are categorical (qualitat…quantitative or qualitative category; first column in the freq…(average) the mean of a set of data is the measure of center f…can resist substantial changes caused by extreme values. 10 26 (i.e. Systems of Equations, Statistics and Probability, and Complex Numbers | SAT Math Study GuideAn experiment is performed a fixed number of times, and each…No, this probability experiment does not represent a binomial…Yes, because the experiment satisfies all the criteria for a b…No, because the trials of the experiment are not independent…An experiment is performed a fixed number of times, and each…No, this probability experiment does not represent a binomial…collections of observations, such as measurements, genders, or…science of planning studies and experiments; obtaining data; a…the complete collection of all measurements or data that are b…collections of observations, such as measurements, genders, or…Table that shows classes or intervals of data entries with a c…Distance between lower and upper limits of a consecutive class…Table that shows classes or intervals of data entries with a c…Values, Measurements or observations, that the variables can a…the collection, organization, summarization, and presentation…generalizing from samples to populations, performing estimatio…Values, Measurements or observations, that the variables can a…is a statement regarding a characteristic of one or more popul…a procedure, based on sample evidence and probability, used to…denoted H0 (Red "H-naught"), is a statement to be tested.
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