Quiz
100-110
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Perguntas do quiz (11)
1100. From past experience a professor knows that the test score of a student taking her final examination is a random variable with mean 75. Suppose, in addition, the professor knows that a variance of a student’s test score is equal to 25. Find the right inequation.
- AP(|x-75|<30)> 1/36
- BP(65<=x<=85) >= 3/4
- CP(60<=x<90) > 1/9
- DP(X>80) > 75/80
- EP(|x-75|<=45) < 80/81
2102. Find the false statements.
- A0 <= F(x) <= 1
- BF(-∞) = 0
- CF(+∞) =0
- DF(x) = P(X < x)
- E-∞∫+∞ F(x)dx = 1
3101. Find the right statements.
- AD(X) = -∞∫+∞ x^2f(x)dx
- BM(X) = -∞∫+∞ xf(x)dx
- CF(x) = f'(x)
- DD(X) = -∞∫+∞ x^2f(x)dx-M(X)
- EP(X>A) > M(X)/A
4103. Find the false statements.
- A-∞∫+∞ f(x)dx = 1
- BP(x1 <= X <= x2) = x1∫x2 f(x)dx
- CF(x) = -∞∫x f(t)dt
- DP(x1 <= X) = x1∫+∞ f(t)dt
- EP(x1 <= X < x2) = F(x1) - F(x2)
5104. Find the false inequations.
- AP(|X-M(X)|>E) <= D(X)/E^2
- BP(|X-M(X)|>E) < D(X)/E^2
- CP(|X-M(X)|>E) >= D(X)/E^2
- DP(X>A) <= M(X)/A
- EP(X<=A) > 1- M(X)/A
6105. Find the right property of distribution function.
- AF(-∞) = 0
- BF(-∞) = 1/2
- CP(x1 <= X) = x1∫1 f(x)dx
- D-∞∫+∞ f(x)dx = 1
- EF(+∞) = +∞
7106. Find the right property of probability density.
- A-∞∫+∞ f(x)dx = 1
- Bf(-∞) = 1/2
- CP(x1 <= X) = x1∫1 f(x)dx
- DF(-∞) = 1
- EP(x1 <= X < x2) = F(x1) - F(x2)
8107, Let a series of distribution of a random variable be given: Photo. What does this tell us about the random variable X?
- A
- B
- CM(X^2)=9
- DD(X) = 10
- EM(X)=1
- A
9108. Let a series of distribution of a random variable be given: . What does this tell us about the random variable X?
- A
- B
- CM(X) = 4
- DD(X) = 22.2
- EM(X) = 9
- A
10109. Let a series of distribution of a random variable be given: . What does this tell us about the random variable X?
- A
- BD(X) = 1.09
- CD(X) = 1
- DM(X) = 2
- A
11110. Let a series of distribution of a random variable be given: . What does this tell us about the random variable X?
- A
- B
- CM(X^2) = 1
- DD(X) = 1
- EM(X) = 0.1
- A
Informações
- Descrição
- Mathematics Quiz sobre 100-110, criado por Mirzhan Abdildayev em 28-12-2019.
- Autor
- Mirzhan Abdildayev
- Idioma
- English
- Visualizações
- 23
- Etiquetas
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