MATH 110 Module 4 Problem Sets 1-4 Answers.

Stati sti cs - Portage Online Summer 2018




Module 4 Problem Set 1-4 Answers
Problem Set 4.1 Solutions.


1. Solution.


The expected value is given by




So, the convenience store can expect to sell 8.48 boxes of sugar per week.


The variance is given by




The standard deviation is given by:




2. Solution.


The expected value is given by




So, the barber can expect 2.46 customers per hour.


The variance is given by

, Stati sti cs - Portage Online Summer 2018




The standard deviation is given by:




3. Solution.


The expected value is given by




So, we can expect 1.7 broken bulbs per box.


Problem Set 4.2 Solutions


1 . Solution.


Here we have n=9, x=7, and p=.75.




2. Solution.


Here we have n=13, x=4, and p=.211.