# ratio

1. ### How to find the trend in binary time-series?

Hello everyone! I have an event that can happen with each of my patients (Y or N), collected over many years. Theses patients are independent of each other. I want to detect the trend taking into account the binary nature of my variable but also the number of cases per year. For example, I...
2. ### What statistical tools should be used for the interval and ratio scales?

Hello, I have read a lot on the internet of examples of differences between the two scales, however I do not understand why statistical tools such as the relative standard deviation are used for the ratio scales and not for the interval scales. I found everything and its opposite on the...
3. ### Nominal & Ratio Variables: How to correlate?

The following is the hypothesis I'm trying to work with: "Students who do not achieve at least 70% in high school English will not pass a college admissions test." I was given a dataset with over 800+ high school English grades expressed in percentages. The dataset also includes whether each...
4. ### Beginner's question: Is profit/loss data always ratio in nature? How to treat it?

Hello, I'm afraid this is another beginner's question. I've only recently grasped the fundamentals of linear and multiple linear regression and I still have the following nagging doubt. I'd like to analyse some sales data for the purpose of forecasting future performance. My dependent...

6. ### Interpretation of the Likelihood Ratio Chi-Square Test Statistic

Do I still use the Chi-Square distribution table to determine the significance of the Ratio Likelihood Chi-Square test statistic? I know you use it for the Pearson's Chi-square test statistic, so I am unsure whether to same rules apply. I calculated the Likelihood Ratio Chi-Square in SPSS...
7. ### Ratio - division by zero

I am working with some data and I was hoping to look at the change in one variable as a ratio of the change in another variable (both have been standardized so that they can be compared) however, in some cases the change in these variables is zero and thus it would result in me trying to divide...
8. ### Plz help...LOG transformation of Ratio in Percentage Independent variable

Hi, In my regression I have used a ratio term (in %) as the independent variable. That value ranges from 0.0001% to 99.95%. Can I take the log of this variable to normalize the variable. Plz help. Thanks in advance
9. ### Fieller-Hinkley Ratio of Correlated Random Variables: Question On Applying Theory

I am a senior in college writing a thesis analyzing and critiquing government income transfer programs, such as SNAP (food stamps). Here is my issue. I am using data collected from the consumer expenditure survey, which will typically provide means, sample sizes, and standard errors. I am...
10. ### Fieller-Hinkley Ratio of Correlated Random Variables: Question On Applying Theory

I am a senior in college writing a thesis analyzing and critiquing government income transfer programs, such as SNAP (food stamps). Here is my issue. I am using data collected from the consumer expenditure survey, which will typically provide means, sample sizes, and standard errors. I am...
11. ### Comparing percent suppression of proliferation

Hi all, I am study a cell type (MDSC) that are known to suppress the proliferation of immune cells (mainly T cells). In order to test for suppression, we do what we call a 'suppression assay'. In this assay, we use 3H-thymidine incorporation to measure (a) proliferation of stimulated T cells...
12. ### Comparing two ratios - Which test should I use?

It has been years since I attempted statistics and I would appreciate any form of help. I am looking at data, and I want to see if one rate influences another rate. I want to know if two rates are correlated and significance of that correlation. The data looks similar to something like this...
13. ### Appropriate statistic for ratio of measurements?

I am designing a study where I measure the electrical conductivity of tissue in two directions. My (pseudo) hypothesis is that, regardless of the magnitude of the measured and predicted conductivities, the anisotropy ratio should be the same for model and measurement. Each measurement and...
14. ### non-parametric equivalence /non-inferiority test for ratio variable?

Good day , I'm comparing subjects' success rates in two conditions A and B. All subjects run both conditions, so the data is paired. Each subject runs say 8 trials in both conditions, with 0 or 1 as output. The outcome for each subject is the ratio variable "success rate" (from 0.0; 0.125 ...
15. ### Possible outcome for an infinite number of rolls of a die

Suppose the following: I have a die with 10 faces. 9 faces say 'lose' and 1 face says 'win'. I repeatedly roll the die forever (i.e. an infinite number of rolls). Is it guaranteed that at some point between now and infinity, the number of times the die has landed on the 'win' face, will...
16. ### Help on Ratio

Can anyone help me? For example, I have a store, 4 people bought iPhones and each buyer bought accessories too. Buyer#1: 1 iPhone, 4 accessories Buyer#2: 2 iPhone, 6 accessories Buyer#3: 2 iPhone, 4 accessories Buyer#4: 4 iPhone, 9 accessories What is correct: 1. The Ratio of...
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### 2 groups with ratio(s); How to test between-/within-group differences?

Hi statistics community I am wondering if anyone could please give me advice on my rather simple (I assume) statistical problem. I am working with animal breeding data. I have two groups of animals, group 1 with both partners from the same region, and group 2 with both partners from...
18. ### Significance testing between ratios

Hi, I'm working with employment data to compare my local region with Pennsylvania's employment as a whole. I'd like to determine whether differences from the overall ratio are significant, e.g. my region has 20.23% of PA's 5,426,530 jobs. But in, say, the Air Transportation sector, we have...