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Statistics Homework assignment
36) The given series is in the ascending order with 11 items.
Hence Median = 6
th
item = 39
37) I quartile = III item = 29
II quartile = 10
th
item = 43
IQR = 43-29 =14
38) Curvilinear suits more. For straightline, deviations are more. But
curvilinear model deviations are less than linear.
39) 150(90%) = 135
40) Std dev =sq rt if npq = sq rt of 1.35=1.161
41) Mean of sampling distribution = 18.6
42) Std deviation of sample = std dev/sq rt n = 6/8 = 0.75
43) Expected mean =
= 0(0.38)+1(0.42)+2(0.18)+3(0.02)
= 0.84
E(x
2
) =
= 0(0.38)+1(0.42)+4(0.18)+9(0.02)=1.32
44) Var(x) = 1.32-0.842 = 0.6144
Std dev = sq rt var = 0.7838
45) P(E)+P(H) not < equals 1. So E and H are not mutually exclusive.
46) P(H/E) = P(EH)/P(E) = 0.5/0/7 = 5/7
47)...