Please Help Thank you Find the mean, variance, and standard deviation of the bin

Question

Please Help Thank you

Find the mean, variance, and standard deviation of the binomial distribution with the given values of n and p. Identify any unusual values. n = 50, p = 0.4 The mean, mu, is (Round to the nearest tenth as needed.) The variance, sigma^2, is (Round to the nearest tenth as needed.) The standard deviation, sigma, is (Round to the nearest tenth as needed.) For each number listed, enter Y if the number of successes is unusual otherwise enter N. Number of Successes 0 10 20 30 40 50 Unusual? (to answer d., use either probabilities or the mean and standard deviation)

Explanation / Answer

a) Mean is n*p which in our case is 50*0.4 =20

b) Variance is n*p*(1-p)=20*0.6=12

c) standard deviation is square root of variance which is sqrt(12)=3.464

d) Values that are 20+3.463*3 away from mean ( 3 standard deviations) wil be unsusual. Thus this means >30.398 values wil be unsusual, thus 40 and 50 are unusual

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---