statistics

I've spent like 5 hours trying to figure out how to insert a bar (called overstrike or overline) over a word ... like the bar that goes over x for "mean" ... but I have to put the bar over the word "pred" in the results section of my dissertation. I've tried to use the formula function but when...

Hi, would someone mind reading this study and explaining the statistics used and some of the graphs and charts? I'm only in an introductory statistics class so I'm not familiar with all the statistics in this study. http://www.nature.com/ijo/journal/v30/n9/full/0803279a.html Thank you!

Type I and II errors seem really theoretical. In real life, how would you ever know if you're making a Type I or Type II error? Can anyone provide any practical examples of where someone doing social science research has found out they've committed one of the two errors?

I have attached a homework problem to this post. It asks what the probability is that all 4 watches of a selection are inaccurate when the manufacturer claims that .05% of all its watches are inaccurate after a year. This is where I get so tripped up, I know that Probability is # of...

Hi, I have a question as homework to solve, but although it's so easy (as everyone says) I am not still able to solve it. Could you please help me with that? We have two coops: in coop 1 there are 10 male and 5 female chickens. Coop 2 has 5 male and 10 female chickens. We randomly select...

I have a computer model, which I need to run 3500 times with different input parameters. The model's accuracy depends on a constant, let's call it T, which unlike the input parameters doesn't change between model runs. By decreasing T, the model's accuracy improves but the computational cost...

Someone please please help me make sense of these stats! I really need help with interpreting outcome of studies! How do i calculate CIs (no need to know actual calculation as can use calculator) and make sense of outcome... Any help would make me forever grateful! STUDY 1. Pre- and...

I'm having real trouble interpreting the output from my ANCOVA. I have two conditions control and experimental, my dependent variable is state self-esteem and my covariate is trait self-esteem. In the model I have included gender and condition as a fixed factors and the covariate as trait...

I need to compute: The sum of squares associated with sex from the ANOVA table; Create histograms of the data used in the ANOVA for each level of Sex independently. Using this output and boxplot and apply do you think the assumptions of ANOVA have been met? How do I input the data of...

Hi I am totally new to stats and finding it very difficult. I was wondering whether or not anyone could help me understand which T-Test to use to try to see if my results are statistically significant. I'll try to explain the situation. I have 8 sub groups, which make up two main groups (A...

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...

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...

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...

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...

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...

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...

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...

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...

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...