# Tagged Questions

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### which test should be used to detect the effect of one variable on another?

I have conducted a research on four independent groups of students; one experimental and one control group at two levels. The design of the study was like a pre-test and post-test. I want to detect ...
15 views

### Correlations for nominal data

I have a gender variable in my questionnaire, I have done it where 1= Male and 2= Female. I would like to correlate this variable with their answers to compare the difference between male opinions ...
46 views

### Correlation and collinearity in regression

I did a correlation analysis for my variables. All of them are associated (the coefficient is above 0). However, there is no collinearity problem in my regression analysis. I do not know how to ...
28 views

### correlation between factors

I am new to statistics and SPSS. I have a questionerre having 30 likert scaled questions, and 5 factors each having 5 or 6 questions. I made the reliability analysis and no problem is found. all ...
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### Have conducted a bivariate correlation - want to identify the outlier - is there a 'statistical' way to do this?

I run correlation (on SPSS) between a governance indicator 1996 and the same governance indicator in 2012. As would be expected there is a near perfect correlation. What I am interested in, however, ...
40 views

### Pearson Correlation for Clustered data

I have a sample that was drawn using cluster sampling. Let say I have variables x and y, and I would like to check the significance of correlation between those two variables in SPSS 20 taking into ...
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Since I found an insignificant result, I performed a power calculation in G*Power. But I am not entirely sure if I input the right number in some fields. My design is a 2(between Ss) x 2(between Ss) ...
41 views

### Scatterplot correlation with covariate (partial correlation) in SPSS - how?

I'd like to make a scatterplot of a partial correlation - so a correlation with covariates. How should I do this in SPSS? If necessary, I could also do it in R. The most important thing is to show the ...
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### Comparing correlations for significance

I am wondering how I would do the following in SPSS. I have a question (question 1) that was asked once before treatment, then the group was split into two different treatment groups (let's say ...
30 views

### SPSS Date Correlation

I have 2 sets of data: one is a list of all days in 2012 in date format (DatesA); the other is a list of dates in 2012 on which certain events occurred (...
29 views

### Contradictive results of correlation and intergroup comparisons

I got strange results in spss and I don't know how to explain them statistically. I made correlations between: 1) personality and emotional inteligence (EI) 2) personality and emotional competence ...
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### Linear correlation in ANCOVA - necessary?

I've been told by my stats prof that running an ANCOVA relies on a series of assumptions, including that the the dependent variable and the covariate are linearly related. So, in SPSS the first thing ...
274 views

### Correlation and group difference with unequal sample sizes

My sample is 60 participants. At first, I did not expect to analyze the correlation, but the result is interesting, so I would like to. The 60 participants are 50 people who have good reading skill ...
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### Correlation between a categorical predictor and a continuous outcome variable

How do I perform correlation between a categorical antecedent variable and a continuous outcome variable? Like for example, correlating EACH attachment style with another variable, i.e, social ...
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### How to compare 37 dichotomous variables (lab tests) to 31 dichotomous variables (diagnosis)

I've constructed a database based on chart review of patients. Patients had a variety of tests performed (37 different types, which were either positive, negative, or not performed aka 1/0/blank - I ...
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### Relationships between health conditions - Spearman's correlation?

I am examining the relationships between health issues in pigs. I want to know which conditions tend to co-occur. All animals have at least one condition and 5 at most. I have coded each condition in ...
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### Correlation between ordinal variable an nominal variable [duplicate]

I want to find correlation between job satisfaction (by likert-type questionare) and sex. Should I use Kruskal-Wallis test to find correlation between two?
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### Is there any way I can manually set the intercept in SPSS?

As part of my dissertation I am looking into the relationship between temperature and methane emissions. A large proportion of this work relies on statistical interpretation and analysis. When ...
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### How to plot a Perception Map

I want to plot a perception map for two brands, Pepsi and Coke, with attributes sweet, caffeine, refreshment, color, likeability for each brand. I got the sample from a blind taste test.
289 views

### Use correlation to compare two time series?

I have two time series data sets which contain hourly-intervalled, monthly, and yearly household electricity consumption in kWh. One data set is produced by a simulation, the other gathered from the ...
180 views

### Advantage of using ANOVA over a kruskal wallis test

This question is a follow on from this question - Correlation with non-normal distribution. An ANOVA explanation was given here - Correlation between vegetation and erosion - that could be applicable ...
181 views

### Correlation with non-normal distribution

I want to find the correlation between a continous variable with a non normal distribution, positively skewed, and a categorical variable with 4 categories. The only test I can find that fits these ...
210 views

### Correlation between vegetation and erosion

I am wanting to find the correlation between two variables: a categorical vegetation variable (with categories 1-4) and a continuous variable of erosion (with values anywhere between 0.2 and 9). I ...
393 views

### How to find relationship between variables using SPSS?

A survey is done to study the prevalence of a parasite in a country, and a questionnaire is designed that has many questions measuring variables like family income, family size, and others. How can I ...
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### 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 ...
4k views

### Correlation between scale and categorical variable

I am trying to find the correlation or association between a categorical variable - classes from 1 -4 from a GIS (geographic information system) classification - and a continuous variable with values ...
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### Correlation and categorical variables

I have a series of categorical variables I have, up until now, been undertaking correlation analysis with. The bulb has now lit up and I'm realising that I've used completely the wrong analysis if I ...
1k views

### Correlation between Likert-type item and yes / no question

I am trying to find correlation between job satisfaction and intention to stay. In order to do so, I am trying to find correlation between Likert scale (agree, disagree, strongly disagree) and ...
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### Is partial correlation possible after Spearman's correlation?

I have two test groups that conducted an online task measuring response times (avg, avg(congruent), avg(incongruent)). I expected one group to be faster than the other but it turned out exactly the ...
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### Need help selecting test for nominal IV with categorical DP

I am going to attempt to give you as much background as possible. My independent variable is nominal and describes the number of days after which an insect was exposed to new conditions (0,1,3,5,7). ...
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### How do I find correlation measure between two nominal variables?

A survey was made where people chose what they use a certain smiley to represent and entered their country of origin. I have recoded the text responses to numeric. What form of analysis should be ...
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### A statistic to describe a correlation with progression

I want to see if the proportion of 'I don't know' responses correlates with the progression through the survey. Generally we expect this proportion to increase ...
3k views

### Performing a biserial correlation on SPSS v21

I have a set of data in which the response variable is continuous and the other independent variables are dichotomous (not naturally occurring). I think I have to perform Biserial correlation (I an ...
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### Correlate continuous data with dichotomous data, with correction for an ordinal variable?

I want to study association b/w continuous data (age) and dichotomous data (complication: yes/no), with "correction" for an ordinal variable (intra-operative nerve laesion). I have a database of 427 ...
254 views

### Pearson correlation output in SPSS [closed]

In my research, I am trying to show the relationship between an IV and a DV. As I compute the Pearson correlation through SPSS, it outputs a correlation matrix. This is not what I want. I need an ...
218 views

### Performing correlation analysis on a variable with separate count columns

I'm looking at a variable that has two options: "Presence of Condition" has two headings "Yes" and "No" with large numbers of both. I'm trying to figure out how to consolidate both so that I can have ...
6k views

### How do you estimate correlations between ordinal and binary data in SPSS?

I'm struggling with my lab report. I have a questionnaire which contains Likert responses (1-7) as well as questions that require only yes or no answers. I want to see if there is a correlation ...
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### Factor analysis or just stick with compare means?

I would be grateful if somebody could assist me with the questions below This is for my dissertation (I am relatively new to SPSS and indeed to statistics). I have a small set of cases (N=41) of ...
118 views

### Fault causal analysis

I have some time-series data, which deal with various incidents / asset failures / faults somewhere in the network that have an effect on performance (we call them Key Performance Indicators). Now, I ...
5k views

### Bonferroni correction with Pearson's correlation and linear regression

I am running stats on 5 IVs (5 personality traits, extroversion, agreeableness, conscientiousness, neuroticism, openness) against 3 DVs Attitude to PCT, Attitude to CBT, Attitude to PCT vs CBT. I also ...
619 views

### What statistic method using spss to use to analyze online buying behavior based on different variables?

I have the data with me however I don't have any idea as to how to analyze the variables. Can anybody help me? The variables/questions are as listed: ...
201 views

### Several bivariate correlation tests

I am looking at the relationship betwwen two interval level variables, being income and subjective well-being and I want to test the overall correlation as well as the correlation in three ...
918 views

### How to perform correspondence analysis on ordinal data in SPSS?

I have 500 rows and three columns. Two of the variables (that i want to analyze) are in ordinal form and the other in scale. However, when i run the correspondence analysis wizard in SPSS i can only ...
18k views

### How to correlate ordinal and nominal variables in SPSS?

I have imported an Excel document in SPSS which contains around 500 entries. Three columns are defined, using Likert scales. I have substituted textual labels of these scales with numerical values ...
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### Z score transformation for testing group differences in correlations

SPSS Help provides the following help for testing group differences in a correlation, using the GLM approach. See link. It first requires that X and Y are transformed into z scores. Question: When ...
1k views

### Controlling p-value in SPSS

I have corrected my alpha level using Šidák correction to take into account the experiment-wise error rate, as I am doing multiple correlation tests using the same data set. My new alpha is 0.00056. ...
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### How to get a redundancy index when performing canonical correlation analysis in SPSS?

I am trying to perform a canonical correlation analysis to investigate the relationship between attitudes (14 variables), perceived consumer effectiveness (6 variables) AND Intention to dine (DV) 14 ...