All Questions
7 questions
1
vote
1
answer
460
views
Shapiro Wilk test of normality
I ran my data under JASP and the p-value for the shapiro wilk test of normality was <.001. How do I interpret this?
- 11
0
votes
0
answers
49
views
Statistical testing for before and after treatment of two independent groups?
I have two sets of continuous variables, weekly sales per customer. One set contains the sales of customers in the control group, and the other set contains the sales of customers in the test group. ...
4
votes
3
answers
1k
views
Statistically significant difference between distributions only knowing the mean and std dev?
I have 3 specimens (A, B & C) and 5 sets of observations from A & B but only 4 from C.
Each set of observations has been reported as a mean & a standard deviation. I do not have access to ...
- 213
2
votes
2
answers
3k
views
Tests of significance for vector-valued distributions
I have a distribution that assigns 3 numbers to each data point instead of one scalar number. These numbers can be e.g. the weight of a person measured at 3 specific ages.
(The distribution can of ...
- 207
0
votes
1
answer
70
views
Statistical Significance of three distributions
Within each of the treatment classes below, I have calculated the subgroup as a percentage in each. For example, Treatment A; Subgroup: <29,999 I would divide 769 by the sum of the Person_IDs for ...
3
votes
1
answer
334
views
Test whether a subset of data is significantly different from a larger set of data
I would like to know the appropriate statistical test for the following data:
I have a dataset of distances in km (10,000 cases) which represent the distance between a motorway and a point of ...
- 31
56
votes
4
answers
80k
views
If the t-test and the ANOVA for two groups are equivalent, why aren't their assumptions equivalent?
I'm sure I've got this completely wrapped round my head, but I just can't figure it out.
The t-test compares two normal distributions using the Z distribution. That's why there's an assumption of ...
- 5,881