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What is a statistical (or probability) distribution?

Which of these statements about the Gaussian distribution is correct?

2. Statistical distribution_2

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Statistical distribution

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Answers

1
Which of these statements about the Gaussian distribution is correct?
applicable to multilple, independent, random variation data
It predicts the mean, but not the variation of data set
It requires that SD< twice the median
It is only a theoretical concept, not practical use.
2
What is a statistical (or probability) distribution?
A mathematical probability function
The variance observed when statistics are applied to data
Used to analyze unknown data
Any set of statistically derived data
3
See image
Chi-square test
Student's t test
Comparison of the means, with analysis of variance
Poisson distribution
4
Which of the following is true of a binomial distribution?
The probabilities of both outcomes must be equal
It is always symmetric around the mean (expected) value
The probability is always one-sided
It is Gaussian-like when p=0.5
5
What is an assumption made in the Student's t distribution?
The population and sample SD are the same
The parent population is Gaussian
The SD is less than 1.97
Variance and SD are not proportional