Posted by Mike on Saturday, March 12, 2011 at 1:29pm.
I need help with this problem for school. For the first one i got .3758 and second 1.6, but i don't think they are right. My calculations are off
It is known that about 20% of car insurance policies include emergency road service. Suppose we randomly select 10 car insurance policies.
What is the probability that at least one policy will have emergency road service?
0.6242
0.3758
0.8926
0.2684
0.1074
What is the expected number of policies having emergency road service?
3.5
8.0
1.6
2.0
5.0

Statistics Help  MathGuru, Wednesday, March 16, 2011 at 9:09pm
You need to find P(0). Use a binomial probability table, with x = 0, n = 10, and p = .2. Subtract the value you find in the table from 1. This will be your probability.
Second part: take n * p, where n = 10, and p = .2.
I hope this will help.
Answer This Question
Related Questions
 Stats  I need help with this problem for school. For the first one i got .3758 ...
 Stats  I need help with this problem for school. For the first one i got .3758 ...
 Need someone to check  It is known that about 20% of car insurance policies ...
 Statistics Need someone to check  Ok so i don't know how i got that answer i ...
 Physics  train car with mass m1 = 521 kg is moving to the right with a speed of...
 Math  i need help finding the slope of the line that passes through each pair ...
 Statistics  Before i state my question I would like to note that I have to do a...
 physics  Two cars are initially moving at constant speeds of 50 m/s (first car...
 Statistics  2.) Car insurance companies assume that the longer a person has ...
 Stastics  Can someone help me and let me know if what I have solved is correct...
More Related Questions