statistical tests

1. Choosing a statistical test.

Hi, I am not very confident with stats but am needing help with analysing my data. I have observational data gained from observing marmosets over a period of five weeks. I am aiming to examine if there is any significant increase in time spent on certain behaviours over the course of these 5...
2. which statistical tests to use?

Hi, I am very new to statistics. I have some data that I would like to perform additional statistical analysis on it. The data is related to two groups of people. Group 1: control group Group 2: people with obesity Group 2 is following a healthy food plan. Measurements are being...
3. Statistical test for comparing percentage not mean

Hi, I am wondering what test should I use to compare two percentage value from two different observations. Let's say I have a damage of crop 15% versus 2% in control, is there a ways to statistically test the significance between the two values? Not sure if this make sense statistically...
4. How to analyze this data

Hello, I have a database with 4 independent variables, and 2 dependent variables. The sample size is ~600. I have two groups: Treatment A and Treatment B. The independent variables in each group are #1: Continuous, #2: Ordinal (3 levels), #3:Ordinal (5 levels), #4 Categorical (Yes/No)...
5. Psychology Stats Report Help Please

Hi there, I'm currently working on a statistics report for a project in psychology. I've collected two lots of data: test scores on two different units of an A-level course: one group is only taking two other subjects, and a second group is taking three subjects. So essentially: 2...
6. Mean Significance Statistical Test

3. In two wards for elderly women in a nursing home the following levels of hemoglobin were found: Ward A: 12.2, 11.1, 14.0, 11.3, 10.8, 12.5, 12.2, 11.9, 13.6, 12.7, 13.4, 13.7 grams/dl Ward B: 11.9, 10.7, 12.3, 13.9, 11.1, 11.2, 13.3, 11.4, 12.0, 11.1 g/dl Ward A Ward B n = 12 n =...
7. Testing when one year's sales volumes vary significantly from this time last year

Hi all, I have a puzzle regarding sales volumes and how to know whether, 6-months into the year, for example, my current volume is on track for budget or not. E.g. it might be -5% off where I need to be to be matching a profile based on last years figures but scaled to hit my target for this...
8. Dependent variable from ratio counts. That's discrete? If yes, which test for low Ns?

Hi all, I have a rather specific question, I somehow don't seem to be able to find the answer to. So I work on biological tissue, where I count the number of cells that have been 'touched' by a particular axon. Meaning that my counts are ratios-percentages: dependent variable: 'percentages of...
9. Which test to use?

Thanks in advance for reading my post. I have a year's worth data that describes the frequency of patient falls organized by the attending physician. Each physician has a unique number of cases (i.e. one doc can have 40 cases, and another has 15). I want to know whether the monthly count...
10. NEED HELP with understanding when to use what method

I have been trying to familiarize myself with statistics but I'm getting confused on what methods to use when answering what questions. For instance, if I want to determine which of a set of tested parameters (A, B, C, ...) are significantly different between two groups, would I use a t-test...
11. [FAQ] Which test should I use?

This is often a dramatically difficult task for those who have little experience in statistics. Luckily there are some good online resources to help you choose. A quick general overview can be found here and here(link supplied by bukharin). Here is a great resource from the biological...