before and after

  1. M

    Correlation - need help to understand which method nto use for before after scenario

    I have three parameters, 1. Attachment level with phone (categorical data eg. Highly attached, detached, highly detached etc) 2. Hours spent using phone before covid (continuous) 3. Hours spent using phone after/during covid (continuous). Now what or how to correlate these three parameters to...
  2. Q

    Hypothesis Testing Help

    Hello fellow statisticians! it's been awhile since I've done stats and everything has completely escaped me. I'm trying to conduct hypothesis testing for the question below. Everyone has been using the Chi-squared test and I feel that they are wrong. I think it should be a poisson distribution...
  3. M

    Before and after comparison troubles

    Hi! I'm having some trouble with my before and after comparison and hope you guys can help me! I have asked the same group of respondents to answer questions about their wellbeing and their main travel mode before and after the introduction of a toll scheme. I want to be able to see if...
  4. A

    One-way anova or paired t-test on intervention study? OR BOTH?

    Hi all. I'm planning a study where I get 3 separate groups of people, make them all do a satisfaction questionnaire, then give each group one different intervention (i.e. 3 different interventions total) and then get everyone to do the same satisfaction questionnaire again after the...
  5. R

    Site, treatment,numbers before and after

    Hi I have data from an environmental experiment. We treated a section of river bed to remove an invasive species. I could do with some help deciding on what test to use in picking through the data as i have spent most of my time working in the field and stats are a bit challenging for me...