suppose a student either has 12 or 3 finals to take each wit

suppose a student either has 1,2, or 3 finals to take each with a respective probability of .19, .47, and .34. What is a student\'s expected number of finals? what is the standard deviation?

Thus we have E(X) = 2.15 = Mean

Variance = E(X^2)-2.15^2

= 5.13- 4.6225=0.5075

std dev = square root of variance = 0.7124

x	1	2	3	Total
p	0.19	0.47	0.34	1
px	0.19	0.94	1.02	2.15
x^2p	0.19	1.88	3.06	5.13

$suppose a student either has 1,2, or 3 finals to take each with a respective probability of .19, .47, and .34. What is a student\'s expected number of finals? w$

suppose a student either has 12 or 3 finals to take each wit

Solution

Get Help Now

Submit a Take Down Notice