# statistics

1. ### Statistical test for app

The tool I'm building will show two (or more images) to an audience of 100 people. The audience will select one of the options. For the customers of the tool, I want to be able to tell them something such as "Option A was chosen x% more than Option B. With 95% certainty, Option A is your better...
2. ### Normalizing traits/statistics based on trait count for each trait type

My goal is to create an app that calculates rarity scores of traits. The rarity score is a formula like so: Rarity score = 1/(%Chance Of occurrence) Let's say I have a trait that has 10% chance of occurring. The rarity score for this trait will be: 10 = 1/(10%). This score will be without...
3. ### Is the difference between two groups bigger, then x2 value bigger and p value smaller?

For chi-square test or other tests involving x2 and p value, is it true that if the difference between two groups is bigger, then x2 value is bigger and p value is smaller?
4. ### Unequal sample size of 2 groups data. Will it affect the ANOVA result?

Hi All, I have a doubt. I have a dataset attached in the below image. I am doing ANOVA on the dataset to findout Dosage have a significant effect on Injected_timing. But I have unequal data(For person1 , there is 2 morning and 1 evening data. For person2, there is 2 morning and 1 evening...
5. ### trying to find the probability of a certain price in the oil market being touched within a time frame

I have built a model that predicts closing prices of the oil market. My goal is to make a model that can help find the probability of reaching a certain price within a certain time frame but I am lost. For example, if oil is at 60.00 a barrel, I would like to know how to find the probability of...
6. ### 'not randomly generated' what does the even mean?!?

As expressed in this question: The telephone numbers for a region of a state have an area code of 570. The next seven digits represent the local telephone numbers for that region. A local telephone number cannot begin with a 0 or 1. Your cousin lives within the given area code. What is the...
7. ### how can I solve this lottery probability?

Lottery consists of 50 tickets, amongst them five tickets with a prize of €10, three tickets with a prize of €5. The rest are empty. What is the probability of buying three lottery tickets and all having prizes?
8. ### Shannon Diversity Index - Do you need the same species across sites to compare?

Hello, I comparing fish diversity from the years 2013 to 2018 in a freshwater river system. There are however different species present in some years. Can I still use the Shannon Index to compare diversity? I have attached my calculations below. Thank you!
9. ### Which test to use? one predictor variable and 3 dependent variables

Hello, I'm hoping someone can help me. I am conducting research for my thesis looking at relationship between social connectedness (IV), and diabetes distress, diabetes self-management and perceived competence (DVs). All are continuous variables measured on self-report likert scale...
10. ### Multivariate logistic regression?

Hi! With my master thesis project, I only use categorical data. I have one independent variabele, with four categories. My dependent variables are dichotomous (yes/no). I would like to use logistic regression to calculate the odds that when the categories of my independent variable are...
11. ### Post-hoc test interpretation

Hi all, I'm struggling to understand my post hoc test, following a significant ANCOVA analysis. for some quick background, my study is on chronotype (whether you're a morning, evening or neither person) and how this links to impulsivity. ANCOVA found a significant main effect of chronotype on...
12. ### Instability equation

Hi all, I am currently doing a research about certain blood protein and am having problems with calculation of its stability. I know I should use instability equation but it seems I can't find the right formula. I had 20 blood samples that were measured in duplicates in three time points (t0...
13. ### R and Stats: Multiple t-testing

So 60 labs decided to group up to test the null hypothesis (sample mean is equal to zero) against the alternative (sample mean is not). The 60 labs collect 10 samples each and all use an α = 0.05 level. Assuming the null hypothesis is true: a) Probability that no labs reject the null? b)...
14. ### HELP ME PLS

25% of all students enrolled in high school XYZ are taking Algebra. 30 students are chosen at random. Find the probability that exactly 7 students out of the 30 chosen are taking Algebra? Use the Binomial Probability Distribution. a. ≈≈16.86% b. ≈≈15.58% c. ≈≈16.62% d. ≈≈15%
15. ### Research Presentation Help

Hello, I am stressing for an introductory business statistics class for university. I currently have the top 200 point getters from the 2018-2019 NHL regular season data tabulated along with each players respective cap hit (or salary) for the season. I am extremely struggling to decide and...

A company makes parts for a machine. The lengths of the parts must be within certain limits or they will be rejected. A large number of parts were measured and the mean and standard deviation were calculated as 3.1 m and 0.005 m respectively. Assuming this data is normally distributed and 99.7%...
17. ### Does a reduced sample size after joining two datasets count as missing data?

Hi there, I have two datasets both share names which is what I use to join them together to form my sample on which I am running a logistical regression. However, after performing a fuzzy join I only have about 55% of the data matching (5.5k out of 10k observations). Does this count as missing...
18. ### Statistical Tool for Agricultural Research (STAR) - An easy user-interface program

Hi everyone! ‍‍:) I made stat vid tutorials. Visit my channel and kindly leave a SUBSCRIPTION. :D Installation is FREE AND EASY!!!! (included in my channel) Click the following link: https://www.youtube.com/channel/UCIWUoP8c3Z_Gr1DOQGmmOCg?view_as=subscriber Statistical Tool for Agricultural...
19. ### convergence in nMDS

Hi, I am running and nMDS in R on abudance data and my nmds does not reach convergence I have tried to increase trymax to 1000, use k=3, use previous best and use noshare but none worked. Is there anything else I could or is there another analysis that I can use instead?