statistics problems

  1. A

    Analysing proportional data?

    Hi! I'm a masters psychology student needing a little help with a dataset I'm analysing :shakehead Dataset: My data has a within-subjects factor of time (i.e. first session vs last session) and a between-subjects factor of group (training vs control). One of my repeated measures DVs looks...
  2. A

    Probability of developing a lung cancer disease

    I need to solve this problem: A cohort study is done to assess the impact of smoking on lung cancer. In this study, a large representative sample of first year university students are followed for 40 years. For each student, the smoking status is recorded as well as the lung cancer status at...
  3. B

    how can I calculate the percentage

    Hello, I have been trying to search how to calculate the best percentage of wastage that its acceptable, and still get high Sale values by using the old data to calculate I have attached file. example of the answer. at 25% of wastage QTY is acceptable.
  4. L

    Please help me find the formula for this

    Hi everyone!Can you please help me find he formula for this. I'm sorry but I don't know. Five light bulbs burned out after lasting for 867, 849, 840, 852 and 822 hours of continuous use. Find the mean and also determine what the mean would if the second value is recorded incorrectly as 489...