Idiotin math.

Excellent  Wrapping-up

Note  the   four  conditions  for  applying  a  binomial  distribution:2  states (success/failure?),fixed  # of  trials,trials  are  independent and probability of  success on every trial is the  same (use  the  table  for  finding  the  figure  for  each p,for  example  p(x=3) equal  to .2428 etc,).Don’t  mix  up ,using sd in  the  formula…[Read more]

Congratulation Eric  for  your  excellent  comprehensive  reply.A  real  expert  answer ,not  like  those few pretenders  who  just introduce  comments  without  any  values.

Try  first to  answer  your simple  quiz  before  jumping to a  higher  level.Don’t  give excuses?I  can  read  your  mind:be  brave and  take  the  challange??

After defining the  problem,Just take  your  time  to find & measure the  right data,then spend  time  to  analyze correctly the  available  data (statistic will be used  mostly  in  those  2  phases),try  to  reeot-cause  the  problem for  finding  the correct  solution.good  luck

Instead  of  dancing  about  the  questions  ,have  some  courage  and  answer  the  simple  question  which  was  posted  to  you?Otherwise ??

The average score on a proficiency exam for  students is 82 with  a  SD of 3.5.If  you  select  a  student  in  random,what is  the  probability that his  score  will  fall  between 85 and  90?