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Questions and Answers
Which symbol represents a population mean?
Which symbol represents a population mean?
- s^2
- σ
- µ (correct)
- n
In the mean-deviation formula, what is the denominator?
In the mean-deviation formula, what is the denominator?
n
Which of the following is a consistent statistical error that gives a result that is too high or too low?
Which of the following is a consistent statistical error that gives a result that is too high or too low?
- Variance
- Deviation
- Bias (correct)
- Error
What is the variable for variance?
What is the variable for variance?
Which of the following is the square root of variance?
Which of the following is the square root of variance?
Which symbol represents the standard deviation of a population?
Which symbol represents the standard deviation of a population?
If s^2 = 330, what is s?
If s^2 = 330, what is s?
Calculate the variance for a seafood company tracking the number of horseshoe crabs caught daily per boat.
Calculate the variance for a seafood company tracking the number of horseshoe crabs caught daily per boat.
Is the data of horseshoe crabs caught daily unimodal, bimodal, or does it have no mode?
Is the data of horseshoe crabs caught daily unimodal, bimodal, or does it have no mode?
What is the range of the data for horseshoe crabs caught daily?
What is the range of the data for horseshoe crabs caught daily?
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Study Notes
Statistical Symbols and Definitions
- Population mean is represented by the symbol µ.
- Variance is denoted by the variable s².
- The symbol for standard deviation of a population is σ.
Statistical Concepts
- The denominator in the mean-deviation formula is n, which represents the number of observations.
- A consistent statistical error resulting in results that are systematically too high or too low is termed as bias.
Calculations and Data Analysis
- The square root of variance is known as the standard deviation.
- If s² = 330, the calculated standard deviation is 18.2.
- A seafood company calculated the variance of horseshoe crabs caught per boat to be 702.7.
- The data regarding horseshoe crabs caught daily per boat has no mode.
- The range of the number of horseshoe crabs caught in this data is 79.
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