T O P I C R E V I E W 
jacquelinewashington 
Posted  11/07/2011 : 19:47:58 1. Among companies doing highway or bridge construction, 80% test employees for substance abuse (based on data from the Construction Financial Management Association). A study involves the random selection of 10 such companies.
A) Find the probability that exactly 5 of the 10 companies test for substance abuse. ________________________________
B) Find the probability that at least half of the companies test for substance abuse. ________________________________
C) For such groups of 10 companies, find the mean and standard deviation for the number (among

1 L A T E S T R E P L I E S (Newest First) 
royhaas 
Posted  11/09/2011 : 10:05:29 Start by reading the section in your textbook about the binomial distribution. There is probably a table as an Appendix you can use to calculate probabilities. 

