help

  1. A

    HELP PLEASE STATISTICS

    A company makes parts for a machine. The lengths of the parts must be within certain limits or they will be rejected. A large number of parts were measured and the mean and standard deviation were calculated as 3.1 m and 0.005 m respectively. Assuming this data is normally distributed and 99.7%...
  2. P

    what sample size is needed for a 99% confidence interval and .025% margin error

    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%...
  3. Yama Karimi

    Which test should be used with 1 dependent variable and 7 independent variables?

    Hello everyone I'm carrying out a research which tries to analyse factors affecting coffee consumption behavior, there are 7 independent variables on hand and 1 dependent variable which is coffee consumption behavior Is Multiple regression analysis can be used while there is relation among...
  4. S

    What test to use in SPSS....PLS HELP :((

    Hi, I'm trying to write my dissertation for my 3rd year undergrad project and I am really stuck with the stats :( I carried out an observational study using questionnaires looking at public knowledge of dementia. I specifically want to look at how knowledge of Alzheimer's Disease (AD) and...
  5. A

    What stats tests should I be running?

    I have data looking at the number of different prey species and the number of different predator species that visited a waterhole and I'm categorizing by time, so eg. 3-6am : 5 prey, 2 predator 6-9am: 10 prey, 1 predator ect. I've tried doing a 2 way anova, and chi squared test but I dont...
  6. M

    Sample size when adding two means

    I want to compare a theoretical mean to a measured mean. But I determine this theoretical mean from adding two measured means. For example, let's say I want to determine if mixing a shade of white paint with a shade of black paint yields a particular gray paint (let’s pretend I can quantify...
  7. M

    Statistic subject test question

    Hello everyone! Merry Christmas in advance! Here I just faced with a little issue of my son that I have no idea how to solve and he obviously neither. I just want to understand how to solve this tasks so I can explain to him and if you can help me I will be more than appreciated. The tasks are...
  8. B

    probability -please help ;(

    Hi! I am trying to do this tasks but can't think of any way to solve this, reading my notes doesn't help at all:/ I've done what I could in ex.3 and started ex.4. I will appreciate help with any task!
  9. L

    what test shall i use need help

    i have 4 numerical variables ( 4 type of boats )and 1 nominal variable ( dolphins behaviour wether eating or social or resting and other) and i want to know if these boat affecting these behaviour and which boat is the most significant one i mean which boat is the most annoying to the...
  10. A

    Capacity Building benefits

    How capacity building can benefits from Infographic on followed link: https://www150.statcan.gc.ca/n1/pub/11-627-m/11-627-m2018020-eng.htm How can I use report from above like to my capacity building plan.