All Questions
7
questions
0
votes
0
answers
87
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Which statistical Test should I use/ Comparing 2 groups
I am new to statistics, can someone guide me regarding the test I should use to compare the foot dimensions of 9 subjects to footwear dimensions (we have 2 footwear brands).
So, to simplify, I have ...
2
votes
0
answers
38
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Is there a parametric trend test with provable power?
I have $N$ samples $x_1,\dots,x_N$ and I want to test following hypotheses.
The null hypothesis is that $x_1,\dots,x_N$ i.i.d. sample from a normal poplulation $N(\mu_1,\sigma^2)$, with unknown mean $\...
- 593
-1
votes
1
answer
36
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How does the normality assumption change a parametric test? [closed]
I understand what a parametric test assumes: normality, equal variance, homoscedasticity, etc. Bu how does this assumption change the setup of the actual test, as compared to a non-parametric test? ...
- 371
5
votes
4
answers
2k
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Why use parametric test at all if non parametric tests are 'less strict'
I have read from several sources, even in my undergrad courses, that parametric tests require the data to have a certain distribution, for instance normal, whilst non-parametric don't.
I have ...
- 211
2
votes
0
answers
58
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Parametric test for testing if two sets of samples came from the same normal distribution with unknown parameter?
Is there a parametric test to see if two sets of samples came from the same normal distribution with unknown parameter?
Suppose I have one set of samples $X_1, X_2, \dots, X_m$ and another set of ...
- 653
2
votes
0
answers
167
views
How do I check data for normality, then what next...?
I am currently undertaking a hypothesis test for some financial returns data. I'm getting slightly confused on parametric versus non-parametric testing. I am testing a market portfolio of 305 stocks ...
- 21
1
vote
1
answer
2k
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Absolute variable as dependent variable
I have the following model:
$$
|X| = B_0 +B_1 \cdot y + B_2 \cdot z ,
$$
where $z$ and $y$ are normally distributed random variables, and $B_1$ and $B_2$ denote the coefficients.
My dependent ...
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