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Hello everyone! I'm currently writing a systematic review and I just can't figure out the study design of one of the included studies. The study is from Davis et al. (2002) with the title "Swallowing with a tracheostomy tube in place: does cuff inflation matter?". The aim of the study was to...

Hi everyone, I'm trying to figure out how the solution to this decision trees question from college makes sense but there's not much explanation and in the notes there are no similar examples either so I'm lost as to where to begin. I'll attach the question/solution to this post. Thanks!

Hi folks :) I'm hoping I can get some help through this forum as I am new to the world of statistics and data analysis. There's a wealth of videos online but it's better to be able to talk these things through with people. :) Cheers

A teacher gives a 20-point test to 12 students. The scores are shown below. 18 17 12 8 8 17 3 7 12 10 20 12 Find the following: Mean Mode(s)...

As a manufacturer of golf equipment, the Spaulding Corp. wants to estimate the proportion of golfers who are left handed. (The company can use this information in planning for the number of right handed and left handed sets of clubs to make) How many golfers must be surveyed if we want 99%...

Hi, I just need some confirmation or not about this. I will try and describe my data in simple terms. I have three groups (cell treatments) and we are measuring a state within those groups (cell death state) and there is a distribution within this state that is NOT independant ie I think they...

I am comparing disease risk scores (non normal data) within the range of antelope which changes during 1.Summer 2.Spring and 3.Winter (my 3 samples) The antelope are in different counties during each season. 32 counties in summer , 33 in spring and 35 in winter (My sample sizes) . Each county...

1) If the correlation coefficient between two random variables X and Y is 0.5, then the correlation coefficient between 2X-4 and 3-2Y is? a. 1 b. 0.5 c. -0.5 d. 0 1) If the correlation coefficient between two random variables X and Y is 0.3, then the correlation coefficient between (2X+3)/5...

Hi, I'm not the best at stats so please keep terms and approaches in layman's terms please - I currently use SPSS too :) I'm not too sure which test to conduct, so any help would be great. I have record of the number of deaths since 1998 - 2016, each having a month when recorded - I...

Can anyone see the error in this? I have used a mock-up model successfully twice, with same spacing, etc., and have gotten great graphs (in the 29 hours since I learned of R's existence). I am going crazy! title.main <- "How Clients Learned VAC Offers HIV/STI Testing" cats <-...

Hey Everyone! :) I am stuck on some stats homework questions! Hoping someone can help me out.. 1. A friend flips a coin 10 times and says that the probability of getting a head is 60% because he got six heads. Is the friend referring to an estimated probability or the​ probability's true​...

Without going into too much detail: I have a number of people every year. At one point, something happens that makes the yearly number of people decline....at least, that's what it looks like without any statistical analysis. Which statistical analysis should I use to prove that there is a...

Hi, I've taken math course's up to Calc III and Diff Eq, but never a statistics course. So I was hoping this forum could help me. I am working with 10+years of temperature data taken from several loggers throughout a cave system. The loggers record temperature every 30mins, which I have...

Hi, I am trying to come up with some syntax for the following query but have so far been unsuccessful. Example Table: Person DateSpec Primary Record Person1 24/05/2015 1 Person1 02/06/2016 0...

Hi! first time poster here! I have done (correctly I hope) most of the exercise except for segment "B) i)" So I need help with it :(:( Here's the exercise [What I've got so far] n = 10 A) sample mean (x) = 5.7 ; Std Deviation = 3.257 B) ii) Error = 2.0143 ; U € [3.685 ; 7.714] 95...

Hey everyone, I've been trying to confirm this for a while but I haven't been able to find a conclusive answer. I'm guessing the answer is pretty simple but I'm a bit rusty and I've looked over it so many times that I'm now a little bit saturated. Basically I am doing a project on bladder...

Hi, This is my test for homework on statistics i'll be very grateful if someone can help me with it

Which of the following is NOT assumed to contribute to uncertainty in predicting y from x in a standard Model I linear regression. a. Uncertainty due to varian of y around model. b. Uncertainty over identifying the true model. c. Uncertainty in measuring X. d. Uncertainty in measuring Y.

Hi So im doing a study and i want to see if there is a trend here What i got: I got data that depends on if a certain animal is using a area (low use and high use) what i want to do is find out if there is a significant difference between low & high area use of this animal I got...