Given that X~Bin(n, 0.4), and that the E[X] = 4.8, what is the value of n? a. 12 b. 4.8 O c. 10 d 0.4

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.3: Binomial Probability
Problem 2E: If a binomial experiment has probability p success, then the probability of failure is...
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1.Given that X~Bin(n, 0.4), and that the E[X] = 4.8, what is the value of n? a. 12 b. 4.8 O c. 10 d 0.4

2. Given that X-N(12,9), and that samples of size 64 are taken, what is the standard error of the sample means? a. 9 b. 0.375 c. 2.67 d. 0.14

3. 

A random variable, X, has a discrete probability distribution as shown in the table belove
5
0.3
X = x
P(X = x)
1
0.1
What is P(X ≤ 2)?
Answer:
3
0.4
7
0.2
Time
Transcribed Image Text:A random variable, X, has a discrete probability distribution as shown in the table belove 5 0.3 X = x P(X = x) 1 0.1 What is P(X ≤ 2)? Answer: 3 0.4 7 0.2 Time
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