Forum: Statistics

I have toxicity data (percent mortality) for a pesticide on a given organism. I want to compare the mortality at the end of 24 hr observation vs the...

We have a small fundraising company and I am trying to give our sales team a better idea of who to prospect and when. In our MS Access database I...

Hi, I am trying to conduct a hypothesis test for percentages correct in a test taken by a person multiple times. There are 60 questions, and I'm...

Control: n=13, Mean=32.77, StDev=32.77, SEMean=3.328 Treatment: n=16, Mean=42.01, StDev=17.2, SEMean=4.3 Point Estimate for treatment - control =...

I have a database that contains samples from two families X_1....X_n~iid Y_1....Y_m~iid I assume (even though it isn't true) that the samples...

Hello everyone, I'm using SPSS and I have a bunch a data I need to crunch. So I have 10 participants, and each participant has two different targets...

I am new to this forum and have limited statistical background from a business BOS 10 years ago. I need help to find an...

hello!!! im studying psychology and i have a problem in my dissertation.in my study i used 3x2 anova in order to examine the effect of colour...

Hi everyone, I have a statistics final coming up and I am always confused with Poisson, Binomial and Hyper-geometric. My teacher specifically...

I am running two regressions, each with the one independent variables (Y) but with two different dependent variables (X1, X2). examply: Y is...

Hi everyone , can you help me for my statistic homework ? Assume that your aim is to estimate the average height of the adult men in a city....

Hello , I started a Statistics class a few weeks ago and i'm still pretty lost. Could someone explain to me how I should resolve this following...

Hi, In a DEA-software I have, I must construct logical weights. These weights are constructed as a matrix solution of relationships between the...

Part of my thesis tries to investigate the extent to which students "test Score" on the topic of electrical circuits in physic can be predicted from...

Hi everyone, In the course of a research project with a sample size of > 1000, I intend to first group users in unique motivation/motive classes....

Good day everyone, and thank you for taking the time to look at my question. 1. The problem statement, all variables and given/known data ...

Use X^2 Test for Independence at the 5% L.O.S. Show your hypothesis, the test, state your conclusion... Show the matrix of the expected values and...

Hi everyone :wave:, I stumbled across this forum after some googling, and I must say very useful stuff you got here. I have a question about...

I'm a cell biologist and struggling with a problem concerning the propagation of uncertainity. Since I'm no expert in statistics, I'll just start...

Hello Folks! Background: ----------------------------------------------- I surveyed telecommuters. Among other variables, I measured the...

Values of Car($1000) 20,10,26,12,19,22,13,16,25,8,10 Student GPA. 2.5 3.5 2.2 3.7 2.7 3.0 2.9 3.2 2.2 3.8 3.7 b)Give the Equation for the...

Hi everyone, First of all I need to tell you that I don't know many things about statistics - I work in finance. Currently I need to...

Hallo! My Homework subject: compare two independent random variables X=(X1, …, Xn ) and Y=(Y1, … , Ym) drawn from a normal distribution and...

Ok, so the problem I'm having is that my tutor has been incredibly unclear about variables for the report we have to write. In class, she said X...

Hi, I'm working on a problem that requires doing OLS by hand. I have the answers but I'm trying to understand why it uses certain formulas, which...

If a free throw shooter makes 80 out of 100, what is the probability that he makes atleast 85 free throws next time. I had one more question as...

I have a question I was going to see if anyone could explain to me. If you roll a die 10 times, what is the probability that you roll a 6 at...

Hi! I am Tusawar. I will be thankful to the person extracting some time to resolve my problem. PROBLEM Suppose we have the following 3 simple...

heya, I was hoping someone could give me some advice on the best way to carry out my stats analysis in my researc hproject. I will be showing...

Can someone please help me with this? Which statistical procedure could I use, and how could I set this up? A company operates four machines during...

This is a pretty simple question and I'm wondering how to go about finding a solution. I have the following data. ttt =...

I have two populations that vary in their ability to complete a task. At the end of each simulation run the mean of each population's fitness is...

I've been struggling with this problem for some time. Any help would be appreciated. A superintendent of a school district believes that the...

I've had this data for so long and I just can't figure out how to analyze it. Please help. I have two groups of students; one group mentored at one...

Moo. Hey now brown cow.

Assume X~f(x;θ), θ>0 where f(x;θ)=x^(-θ) - (x+2)^(-θ). Derive a conservative one-sided upper 95% confidence interval for θ if x=5 is observed. ...

Hi all, looking for some help in best analysis tool to use. I want to test the effects of multiple independent variables on one dependent...

I'm working on a problem that requires me to make a conclusion on possible defective products. I've done z values before but have not come across one...

I need to find the best time to goto the bus stop based on 123 Observable Data's. The data is based on two variables. Weather and Time The...

Hi, I was wondering if you could all hep me decode the difference between both PCA and cluster analysis. As far as I can tell, PCA aims...

I'm having trouble setting up my formula because in this specific problem it's saying the mean is "greater than" 35. I know how to set up the formula...

My question is as simple as it may be difficult: is there any other nonparametric test besides Spearman's rho to compute the correlation strength...

Honestly this problem put me into a stump. I'm used t having set of data values, but now I'm just confused on this. I am just starting statistics so...