STATISTICS
posted by BJ
Suppose that you are in a class of 29 students and it is assumed that approximately 16% of the population is lefthanded. (Give your answers correct to three decimal places.)
(a) Compute the probability that exactly five students are lefthanded.
(b) Compute the probability that at most four students are lefthanded.
(c) Compute the probability that at least six students are lefthanded.

MathGuru
Formula:
P(x) = (nCx)(p^x)[q^(nx)]
For (a):
x = 5
p = .16
q = 1  p = 1  .16 = .84
n = 29
Substitute and calculate for your probability.
For (b):
x = 0,1,2,3,4
p,q,n stay the same.
Add each probability you calculate for the total probability.
For (c):
Add together the probabilities you calculated for (a) and (b). Then subtract that value from 1. This will be your answer for (c).
You could also use a binomial probability table to find the above probabilities as well. This would be easier than calculating each by hand.
I hope this will help get you started.
Respond to this Question
Similar Questions

Statistics
Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are … 
Math
Can someone answer a question similar to a and b so I can use as an example. Consider the following binomial random variables. (a) The number of tails seen in 47 tosses of a quarter. (i) Find the mean. (Give your answer correct to … 
Math check answer
Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are … 
math check
Posted by Nora 56 on Sunday, June 2, 2013 at 7:32pm. Sorry to repost but no one answered after I posted on the 2nd,please help, Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population … 
math check
Suppose that you are in a class of 31 students and it is assumed that approximately 13% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are … 
Statistics help
Suppose that you are in a class of 32 students and it is assumed that approximately 9% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are … 
Stats
Suppose that you are in a class of 31 students and it is assumed that approximately 10% of the population is lefthanded. (Give your answers correct to three decimal places.) (a) Compute the probability that exactly five students are … 
Statistics
In a certain class 27% of the students are lefthanded. suppose that a random sample of 53 students is selected. Find the mean number of lefthanded students in the class. Round your answer to the nearest integer. 
Statistics
In a certain class 27% of the students are lefthanded. suppose that a random sample of 53 students is selected. Find the mean number of lefthanded students in the class. Round your answer to the nearest integer. Pls help! 
statistics
Suppose that you are in a class of 28 students and it is assumed that approximately 8% of the population is lefthanded. (Give your answers correct to three decimal place. Compute the probability that exactly five students are lefthanded