Prob/ Stats Chp 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Variable | a characteristic or attribute that can assume different values
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| Data | the values the variable assume
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| Random Varibale | variable whose values are determined by chance
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| Data Set | a collection of data values
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| Data Value-Datum | each value of the data set
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| Probability | chance the likelihood something will happen
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| Population | consists of all subjects that are being studied
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| Sample | a group of subjects selected from a populations
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| Hypotheseis | a decision-making
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| Independent Varibale (Exploratory) |
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| Dependent Event (Outcome,Resultant) |
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| True vs. Quasi Experiments |
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| Confounding Variable |
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| Hawthorne Effect |
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| Control Group |
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| Treatment Group |
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| Margin of Error |
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| Margin of Error Interval |
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| Biased Question |
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| Unbiased Question |
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| Sequential Sampling |
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| Double Sampling |
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| Multistage Sampling |
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| Examples how statistics is used in everyday life | -sports
-public health
-education
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| Reasons to study statistics | -to understand
-conduct experiments
-comincate results
-be a better consumer
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| Branch areas of Statistics | -Descriptive
organizations, collections, presentation of data
-Inferential
probability, population of all subject being study, Hypothesis Testing-making process for evaluating claims about a population
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| Examples of Variables | Qualities Variables:
Def: can be
Ex: Gender, Color, Religion, Location
Quantitative Variable:
Ex: Age, Weight, Height, Body Temp
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| Boundaries | Ex:
16
you would have
15.5-16.5
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| Measurement Levels | Nominal Ex:
gender,zip code, marital status
Ordinal Ex:
Letter Grade, Ranking
Ratio Ex:
Salary, Age, Height
Intervals Ex:
IQ Test, SAT/ACT, Temperature
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| Two Purpose of Collection Data | 1: Descibe Events or Stituations
2: To help people make better decisions
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| Three Ways to Collect Data | 1: Surveys
2: Surveying Records
3: Direct Observations
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| Advantages and Disadvantages of the three kinds of Surveys |
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| Examples of Each Sampling Method | Random Ex:generating a number at random by the computer
Systematic Ex:selecting the kth subject
Stratified Ex:sort into groups on common characteristics and the sample
Cluster Ex: divided into clusters then select at random
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| Examples of kind of studies |
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| Two advantages for observational |
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| Two disadvantages for observational |
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| Two advantages for Experimental |
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| Two disadvantages for Experimental |
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| Identify the independent variables from studies |
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| Indetify the dependent variables from studies |
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| List the five uses for statistics |
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| List the seven misuses of Statistics |
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| Identify things that make survey question bad |
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| List the Problems for getting random samples | -Every member of the population must be equal
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| List the Problems for getting systematic samples |
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