story Bookmarks Window Help udellinstructure.com Quiz: EXAM 2 Statistics And Pro
ID: 2946341 • Letter: S
Question
story Bookmarks Window Help udellinstructure.com Quiz: EXAM 2 Statistics And Probability Archive September 28, 2015 EXAM 2 Started: Jul 5 at 8:14pm Quiz Instructions This is the second exam in STAT 200 and covers: Probability, Probability with Tables; Discrete Random Variables Continuous Random Variables and the Normal Distribution You can submit your cheat sheet to me via Canvas Messages after you have completed the exam. nts D Question 21 3 pts Binomial Distribution. Surveys repeatedly show that about 40% of adults in the us indicate that if they only had one child, they would prefer it to be a boy. Suppose we took a random sample of 15 adults. Based on a proportion of 40, what is the variance of this distribution? 3.600 1.897 6.000 Previous Next Submit GuExplanation / Answer
Sample size = n = 15
Proportion of adults of US if they only had one child they would prefer it to be a boy is = p = 0.40
The formula of variance of Binomial distribution is = n * p * ( 1 - p )
So variance = 15 * 0.40 * 0.60 = 3.6
The correct answer is 3.6
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.