The probability that the Air Conditioning of a brand new car is defective is 10%. Let X be the number of cars with defective AC in a sample of size 100. (a). Find P(X < 6) exactly. (b). ) Find P(X < 6) approximately, using a Poisson approximation (c). Find P(X < 6) approximately, using a normal approximation. Note: For parts (a) and (b), you only need to provide a formal expression each. For part (c), you need to compute the numerical values using the Q-function table (Table 4.2) from the textbook.

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
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The probability that the Air Conditioning of a brand new car is defective is 10%. Let X be the number of cars with defective AC in a sample of size 100.

(a). Find P(X < 6) exactly.

(b). ) Find P(X < 6) approximately, using a Poisson approximation

(c). Find P(X < 6) approximately, using a normal approximation.

Note: For parts (a) and (b), you only need to provide a formal expression each. For part (c), you need to compute the numerical values using the Q-function table (Table 4.2) from the textbook.

 

TABLE 4.2
Comparison
Q(x)'
Approximation
Approximation
5.00E-01
Q(x)
5.00E-01
3.46E-03
3.47E-03
2.8
0.1
4.60E-01
2.7
4.58E-01
2.55E-03
2.56E-03
2.9
0.2
4.21E-01
4.17E-01
1.86E-03
1,87E-03
3.0
0.3
3.82E-01
3.78E-01
1.35E-03
1.35E-03
3.1
0.4
3.45E-01
3.41E-01
9.66E-04
0.5
9.68E-04
3.09E-01
0.6
3.05E-01
6.86E-04
*3.2
6.87E-04
3.3
2.74E-01
2.71E-01
4.83E-04
4.83E-04
3.4
3.37E-04
3.5
2.33E-04
3.6
1.59E-04
3.7
1.08E-04
3.8
7.24E-05
3.9 4.81E-05
0.7
2.42E-01
2.39E-01
3.36E-04
0.8
2.12E-01
2.09E-01
2.32E-04
0.9
1.84E-01
1.82E-01
1.59E-04
1.0
1.59E-01
1.57E-01
1.08E-04
1.1
1.36E-01
1.34E-01
7.23E-05
1.2
1.15E-01
1.14E-01
4.81E-05
1.3
9.68E-02
9.60E-02
4.0
3.16E-05
3.17E-05
4.5 3.40E-06
1.4
8.08E-02
8.01E-02
3.40E-06
1.5
6.68E-02
6.63E-02
5.0
2.87E-07
2.87E-07
1.6
5.48E-02
5.44E-02
5.5
1.90E-08
1.90E-08
1.7
4.46E-02
4.43E-02
6.0
9.86E-10
9.87E-10
6.5
1.8
3.59E-02
3.57E-02
4.02E-11
4.02E-11
7.0
1.9
2.87E-02
2.86E-02
1.28E-12
1.28E-12
2.0
2.28E-02
2.26E-02
7.5
3.19E-14
3.19E-14.
6.22E-16
8.5
2.1
1.79E-02
1.78E-02
8.0
6.22E-16
2.2
1.39E-02
1.39E-02
9.48E-18
9.48E-18
2.3
1.07E-02
1.07E-02
9.0
1.13E-19
1.13E-19
2.4
8.20E-03
8.17E-03
9.5
1.05E-21
1.05E-21
2.5
6.21E-03
6.19E-03
10.0
7.62E-24
7.62E-24
2.6
4.66E-03
4.65E-03
Transcribed Image Text:TABLE 4.2 Comparison Q(x)' Approximation Approximation 5.00E-01 Q(x) 5.00E-01 3.46E-03 3.47E-03 2.8 0.1 4.60E-01 2.7 4.58E-01 2.55E-03 2.56E-03 2.9 0.2 4.21E-01 4.17E-01 1.86E-03 1,87E-03 3.0 0.3 3.82E-01 3.78E-01 1.35E-03 1.35E-03 3.1 0.4 3.45E-01 3.41E-01 9.66E-04 0.5 9.68E-04 3.09E-01 0.6 3.05E-01 6.86E-04 *3.2 6.87E-04 3.3 2.74E-01 2.71E-01 4.83E-04 4.83E-04 3.4 3.37E-04 3.5 2.33E-04 3.6 1.59E-04 3.7 1.08E-04 3.8 7.24E-05 3.9 4.81E-05 0.7 2.42E-01 2.39E-01 3.36E-04 0.8 2.12E-01 2.09E-01 2.32E-04 0.9 1.84E-01 1.82E-01 1.59E-04 1.0 1.59E-01 1.57E-01 1.08E-04 1.1 1.36E-01 1.34E-01 7.23E-05 1.2 1.15E-01 1.14E-01 4.81E-05 1.3 9.68E-02 9.60E-02 4.0 3.16E-05 3.17E-05 4.5 3.40E-06 1.4 8.08E-02 8.01E-02 3.40E-06 1.5 6.68E-02 6.63E-02 5.0 2.87E-07 2.87E-07 1.6 5.48E-02 5.44E-02 5.5 1.90E-08 1.90E-08 1.7 4.46E-02 4.43E-02 6.0 9.86E-10 9.87E-10 6.5 1.8 3.59E-02 3.57E-02 4.02E-11 4.02E-11 7.0 1.9 2.87E-02 2.86E-02 1.28E-12 1.28E-12 2.0 2.28E-02 2.26E-02 7.5 3.19E-14 3.19E-14. 6.22E-16 8.5 2.1 1.79E-02 1.78E-02 8.0 6.22E-16 2.2 1.39E-02 1.39E-02 9.48E-18 9.48E-18 2.3 1.07E-02 1.07E-02 9.0 1.13E-19 1.13E-19 2.4 8.20E-03 8.17E-03 9.5 1.05E-21 1.05E-21 2.5 6.21E-03 6.19E-03 10.0 7.62E-24 7.62E-24 2.6 4.66E-03 4.65E-03
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