0
votes
0answers
22 views

3 way mixed ANOVA & pairwise comparisons effect size

im in desperate need of some help for my data analysis assignment! I have a 3 way mixed anova- where I have 2 sig main effects, one significant two way interaction and the sig three way ...
0
votes
0answers
5 views

Two Data Collection Method Groups

I have collected around 20 respondents by post; and by email around 150 respondents. I would like to know whether I can combine the two groups, the independent sample t test shows that there is a ...
0
votes
0answers
18 views

How to treat “Missing Value Analysis” test results (problems)

I have a problem with Missing Value Analysis. I am using SPSS version 20. I am trying to test whether missing values are at complete random. As I know in order to ensure missing values are completely ...
0
votes
0answers
53 views

Please help with basic interpretation of an insignificant interaction. (With significant main and conditional effects)

I have a very basic understanding of statistics, and have done many correlations and regressions or simple t-tests, but never an interaction and it is confusing me a bit. I only need to understand the ...
0
votes
0answers
21 views

What statistical tests to run given the design?

I have 3 research questions. 1) Does increased hyperlink insularity cause better user understanding? 2) Does increased hyperlink insularity cause better user perceived security? 3) Does increased ...
0
votes
0answers
43 views

Correlation significance test with standardized z scores

I am using spss I am looking at a criterion-validity concurrent design. I had to transform two groups performance ratings into z scores because there were differences in how raters rated them on the ...
1
vote
0answers
33 views

Compairing 2 ideas - multiple dependent variables

I am trying to compare 2 ideas to see which one is better/more effective - I am looking to see if a significant difference. (2 conditions) We used a questionnaire to gather feedback from hundreds of ...
0
votes
0answers
28 views

Empty significance in SPSS linear regression

I got a weird result with linear regression: there are empty significances. I use 'Stepwise' method, so it should drop the inadequate variables. (Of course the "000" Betas are confusing too.) What ...
0
votes
1answer
70 views

How do I convert unstandardized RMR estimates into standardized RMR estimates?

I am having difficulty turning unstandardized RMR estimates from AMOS software output in a SEM into standardized estimates to enable suitable interpretation. Can someone give me advice on where to ...
4
votes
1answer
153 views

Statistical significance for comparison of linear regression models

I have two linear regression models (with the same predictors) that try to estimate two different (although related) features of the same population. I am analyzing the hypothesis that these ...
0
votes
0answers
26 views

How can I statistically compare two time-series? [duplicate]

I have two time-series. Data have been logged over time for two different objects. Is there a significance test, applicable in SPSS or Minitab, that can be used to determine whether there is a ...
0
votes
0answers
222 views

Box and whisker plot or bar plot with mean and SE?

I am trying to present my data in a meaningful way. To do so, I thought it is a good idea to use a box and whisker plot, because, it shows min, max, median and skewness of data. However, due to ...
1
vote
1answer
156 views

One way Anova Test validation

Let me give you an example to show what i am trying to. Let's say 50 patients started a cure for a disease and it took 2 months. So, I want to compare the first month's tumor sizes to the second ...
0
votes
0answers
24 views

A research containing the statistical difference between two samples

I have conducted a research in which 120 people participated. For my survey I created two visual images (casual and clown). Sample 1 (n=60) conducted the interview with the casual person Sample 2 ...
31
votes
7answers
3k views

Why is “statistically significant” not enough?

I have completed my data analysis and got "statistically significant results" which is consistent with my hypothesis. However, a student in statistics told me this is a premature conclusion. Why? Is ...
0
votes
0answers
70 views

Chi-square analysis

I am trying to determine association between my independent variables (categorical, nominal) and dependent variables (categorical, nominal). What other statistical analysis I can use aside from ...
1
vote
2answers
174 views

Help translating the following PCA results into layman's terms?

As a non-maths doctoral candidate, I would be absolutely thrilled to bits if anyone here might be willing to take a stab at translating the following PCA results into layman's terms. There are only ...
0
votes
0answers
294 views

Cross-correlation significance in SPSS

How do I test the significance of cross-correlation values in SPSS? It seems there is no option for this.
1
vote
2answers
989 views

How can you implement a two-way ANOVA with nesting in R or SPSS?

I currently am conducting a study where I have three variables: one that is binary, and two numerical ratio variables. Each of the subjects in my study has values for each of the three variables. ...
1
vote
1answer
349 views

GLMM in SPSS: what does significance of the fixed coefficients mean?

I conducted a GLMM analysis in SPSS with y~a+b+a*b. The output result contains two tables: the fixed effects, for which the main effects and the interaction ...
1
vote
2answers
446 views

Comparing two sets of time-series (physiological measures)

I need help in finding which statistical approach I need to use. I have two groups: G1 (disease) and control. For both groups we measured their blood level every 10 minutes: 0 to 650 min. We are ...
1
vote
0answers
29 views

How to test for significant difference between 2 binary variables in one sample [duplicate]

I would like to test if there is a significant difference between the pre-test and post-test in a dichotomous variable (0 = "False", 1 = "True"). I'm using only one sample of 30 subjects. So, my 2 ...
2
votes
0answers
99 views

Test regression parameter against a constant in SPSS

This is a pretty basic question, but I can't find an answer by searching for different statements of the same problem. Is there a straightforward way to test if a regression parameter is different ...
0
votes
2answers
258 views

are there any statistically significant differences between my study population and a sub-group within it?

I have a total population of 31, of these I have a treatment finishing population of 20. I want to run a test on SPSS to identify if there are any significant differences between the 20 individuals ...
1
vote
0answers
118 views

How to compare two survival percentages for two different populations?

I calculated the 5 year survival of two populations keeping different variable constant each time and got percentages. I wanted to determine if these percentages were significantly different from each ...
-3
votes
2answers
221 views

How do I find if there is a significant difference in the number of males and females in a single population?

Also, how do I find if there is a significant difference in the number of males in two populations? In SPSS please!
1
vote
1answer
238 views

Compare means of two groups with a variable that has multiple sub-group

I was unable to understand how to compare multiple mean values in each group. Within the subgroup the mean values influence each other (If one changes, the other changes automatically). I collected ...
0
votes
1answer
822 views

What does it mean to have an F-value of .000 and Sig. of 1.000 (in SPSS)?

We conducted this very simple 2x2 Between Subjects Factorial Design Experiment, where the DV were their answers to a classic insight problem. Since there is only one correct answer to the problem, the ...
6
votes
1answer
446 views

Wald vs. LR $\chi^2$ tests in SPSS generalized linear models

I'm using the generalized linear models function in SPSS with a normal distribution and identity link function. If I choose the likelihood ratio $\chi^2$ statistic, I get the same results as the ...
1
vote
2answers
594 views

What significance level is required with a small data set?

My apologies if this has been answered here. It's my first time here. I am a developer by trade. I am not really into this thing, but I was asked to do some data simulation using SPSS. But I am not ...
3
votes
2answers
4k views

How to compare two time series?

I have collected temperature readings for 4 locations on a beach in Cornwall UK using data loggers. The loggers recorded temperature every 15 mins accurate to .1 of a degree (Celsius). The loggers ...
1
vote
2answers
574 views

Test to determine significance for non normal data with different variance and unequal n?

How can I find out if the differences in length and width of cut marks left in fabric are significantly different between groups (knife types)? Additional Information Groups: ...
2
votes
1answer
10k views

How to read result from Kolmogorov-Smirnov one-sample test in SPSS?

I'm newbie and bit lost... Can someone help me read this result from SPSS 1-sample Kolmogorov-Smirnov test (poisson distribution). ...
4
votes
1answer
206 views

How to assess differential risk of disease across three groups after adjusting for other risk factors?

I have 3 different groups: A, B, and C: A (has a medical condition) has 30 entries B (another medical condition) has 31 entries C (control group) has 55 entries All participants have information ...
3
votes
6answers
474 views

How to assess effect of intervention in one state versus another using annual case fatality rate?

I am a beginner in statistics with just basic knowledge. I have these data: cases, deaths and CFR (Case Fatality Rate-deaths per 100 cases) of a disease for 17 years (1994-2010) from 2 neighbouring ...
3
votes
1answer
794 views

How to do Chow test for constancy of parameters across 2 groups

I am a beginner in statistics and poor in mathematics. I am trying to to assess effect of intervention in one state versus another using annual data. ...
2
votes
2answers
629 views

Column Means Significance Tests in R

New to the site. I am just getting started with R, and want to replicate a feature that is available in SPSS. Simply, I build a "Custom Table" in SPSS with a single categorical variable in the ...