Suppose that p is the probability that a randomly selected person is left-handed. The value 1 − p is the probability that the person is not left-handed. in a sample of 100 people, the function V p = 100 p 1 − p represents the variance of the number of left-handed people in a group of 100. a. What value of p maximizes the variance? b. What is the maximum variance?
Suppose that p is the probability that a randomly selected person is left-handed. The value 1 − p is the probability that the person is not left-handed. in a sample of 100 people, the function V p = 100 p 1 − p represents the variance of the number of left-handed people in a group of 100. a. What value of p maximizes the variance? b. What is the maximum variance?
Solution Summary: The author calculates the value of p (the probability that a randomly-selected person is left-handed) that maximizes its variance.
Suppose that p is the probability that a randomly selected person is left-handed. The value
1
−
p
is the probability that the person is not left-handed. in a sample of 100 people, the function
V
p
=
100
p
1
−
p
represents the variance of the number of left-handed people in a group of 100.
sy = f(x)
+
+
+
+
+
+
+
+
+
X
3
4
5
7
8
9
The function of shown in the figure is continuous on the closed interval [0, 9] and differentiable on the open
interval (0, 9). Which of the following points satisfies conclusions of both the Intermediate Value Theorem
and the Mean Value Theorem for f on the closed interval [0, 9] ?
(A
A
B
B
C
D
=
Q6 What will be the allowable bearing capacity of sand having p = 37° and ydry
19 kN/m³ for (i) 1.5 m strip foundation (ii) 1.5 m x 1.5 m square footing and
(iii)1.5m x 2m rectangular footing. The footings are placed at a depth of 1.5 m
below ground level. Assume F, = 2.5. Use Terzaghi's equations.
0
Ne
Na
Ny
35 57.8 41.4 42.4
40 95.7 81.3 100.4
Q1 The SPT records versus depth are given in table below. Find qan for the raft 12%
foundation with BxB-10x10m and depth of raft D-2m, the allowable
settlement is 50mm.
Elevation, m 0.5 2
2 6.5 9.5 13 18 25
No.of blows, N 11 15 29 32 30 44
0
estigate shear
12%
College Algebra with Modeling & Visualization (5th Edition)
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