# statistics

1. ### Computing the test statistic: Not sure which Formula I need

Not sure which formula to use... A Health and Fitness company would like to determine if a new product improves cardiovascular fitness. A sample of 20 new customers agreed to take a treadmill test before and after using the product. The test measured how long they could run on the treadmill...
2. ### Seemingly unsolvable conditional probability

The following is a question that is likely to be appear on my exam on Friday (tomorrow) but contextualised into a different scenario. I'm having serious difficulty figuring out how to go about answering it. If anybody has encountered something similar and could provide a step by step explanation...
3. ### Picking the correct test, need help urgently!

Hello, I feel like the answer for this is probably really obvious but I am being missing it altogether. This is my data: Habitat Associating Not Associating Total Observations Flood 51 0 51 Levee 524 72 596 Liana 162...
4. ### Data input into SPSS: What happens if there are more treatment data sets than control

Hi guys, I am currently on the results section of my dissertation in Sports Science and I am having trouble completing my two-way repeated measures ANOVA due to data input complications. I have searched the internet and had my head in a few books but I am yet to find anything. Basically in...
5. ### Similar numbers in a data set

Hi guys, I am looking at a programming problem here, and would like to "deduce" a formula out of my problem. I have an array of n (known) columns and two rows. I populate this array with number in a range (1 to n) let's say 1 to 5 for the example. 1 3 2 5 1 n 2 4 1 4 2 n What I...
6. ### how to describe the residual plots.. plz help

Hello everyone... can you guys help me describe the residual plot.. whether it shows some sort of pattern of not and also whether it shows independence or dependence.... i've upload few images of the residual plots.. just guide me with the steps.. how to analyze and on what basis should i say...
7. ### Help with creating indicator age variable

0 down vote favorite I am working on this project which needs to be done by tomorrow and I am stuck on creating the indicator variable. I am supposed to create indicator age variables for respondents that fit into the following age buckets. - Age 18-24 - Age 25-44 - Age 45-64 -...

Hello Could you please help I am doing a study on leadership for my dissertation. I trying to find out which leadership style and the degree to which personality traits are preferred in a leader. In addition, I also want to find out which leadership style and the degree to which...
9. ### Permutation Testing to find significant molecules

Apologies if this is quite a basic question but I'm fairly new to stats. I have a 24 x 70 matrix consisting of rows of 24 human serum samples and columns of protein intensity values for 70 different proteins. The 1st 12 rows are healthy people (type 1), the remaining 12 rows are patients...
10. ### Sum of squares model proof

Hello everyone :-) I'm trying my best to prove the formula for the sum of squares model (please excuse how badly i'm going to write this) Betahat'X'Y-n(ybar)squared so far i have that it is equal to (yhat-ybar)'(yhat-ybar) so i just need to show that they equal eachother. I know...
11. ### Comparing groups- what test to use

Hello, I am looking to compare the means for two groups (midfield - forward; top - bottom) against each other. Could someone please assist me in choosing what t test to use, or whether it is even a t test. an example of the data I am comparing is: Goals Top 5 Goals Bottom 5...
12. ### Mixed ANOVA difficulty ! HELP NEEDED

Hello... im relatively new to psychology statistics and struggling to understand some things. My experiment is a 2 (common vs distinct faces )x 2 (control vs experimental condition) mixed repeated anova design The problem is the interaction between the faces and the conditions - how do i...
13. ### Binomial Distribution

A company starts a fund of M dollars from which it pays \$1000 to each employee who achieves high performance during the year. The probability of each employee achieving this goal is 0:10 and is independent of the probabilities of the other employees doing so. If there are n = 10 employees...
14. ### 4 Vowel Intensities, Amplitude Spectrum of EEG - Multiple Logistic Regression?

I have EEG recordings of the neural response to speech (a male vowel with a fundamental frequency of 100Hz). The vowel was presented to each subject (n=15) at four different intensities (55dB, 65dB, 75dB, and 85dB), and I ran FFTs and pulled the amplitude at all of the harmonics of the...
15. ### Help needed!

I am having some trouble with the following problem... Investment trusts are companies whose sole activity is the owning of shares in other companies. Each trust may, typically, hold shares of 100 or more selected other companies. The dividends paid by investment trusts are thus the dividends...
16. ### Scatterplot relationship issue.

Hi, the data below is just a sample of the data I am trying to enter into a scatterplot. The issue is that a previous correlation test shows a p value of 0.011, a clear relationship. However, when I took the averages of 196 entries of the data below, the scatterplot shows little...
17. ### Help with regression analysis and 95% confidence interval

Hello! We have a couple of tasks for an assignment where we need to use regression analysis and 95% confidence interval, we're not sure on how to do it so figured I'd ask you guys for help. We don't really need the result of the actual task, but rather an detailed explanation to how to do...
18. ### Simple probability problem

A glass jar contains 55 red and 25 blue marbles. What's the probability of choosing a red marble 16 times in a row. After a pick the marbles don't go back in the jar. Also what is the probability of picking 16 red marbles in a row if this experiment is repeated 10 and 20 times. Thanks
19. ### Probability Question

Hello I am reviewing one of my exams for my final and am very confused when it comes to this question; The probability that at least one of the two chosen patients are less than 35 years old? Given: the sample size is 100. 43/100 of the patients are less than 35 and they are drawn at random...
20. ### I do not understand..

Could someone list the steps using excel, mathcad, and/or minitab. Thank you. 1. Did the eight divisions in professional football score equally well on average? Justify your answer. 2. Compare the scoring performance of the two conferences. (I already asked a teacher for help and they did...