Test
Mat III
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Preguntas del test (22)
198. Find the right inequation.
- A1
- B2
- C3
- D4
- E5
299. Let X ~ Binomal(n,p) . Find the right inequation.
- A1
- B2
- C3
- D4
- E5
3100. 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.
- A1
- B2
- C3
- D4
- E5
4101. Find the right statements.
- A1
- B2
- C3
- D4
- E5
5102. Find the false statements.
- A1
- B2
- C3
- D4
- E5
6103. Find the false statements.
- A1
- B2
- C3
- D4
- E5
7104. Find the false inequations.
- A1
- B2
- C3
- D4
- E5
8105. Find the right property of distribution function.
- A1
- B2
- C3
- D4
- E5
9106. Find the right property of probability density.
- A1
- B2
- C3
- D4
- E5
10107. Let a series of distribution of a random variable be given:
What does this tell us about the random
variable X?
- A
- B
- C
- A
11108. Let a series of distribution of a random variable be given:
What does this tell us about the random
variable X?
- A
- B
- A
12109. Let a series of distribution of a random variable be given:
What does this tell us about the
random variable X?
- A
- B
- CD(X) = 1
- DM(X) = 2
- A
13110. 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
14111. Let a series of distribution of a random variable be given:
What does this tell us about the random
variable X?
- A
- BM(X) = -7/4
- CM(X^2) = 4
- DD(X) = 8
- ED(X) = 55
- A
15112. The probability of working each of four combines without breakages during a certain time is
equal to 0,9. The random variable X – the number of combines working trouble-free. What
does this tell us about the random variable X?
- A1
- B2
- C3
- D4
- E5
16113. A die is tossed before the first landing “six” aces. Find the probability that the first
appearance of “six” will take place at the -th tossing the die?
- A1
- B2
- C3
- D4
- E5
17114. A random variable X is distributed under an exponential law with parameter . Find the
probability of hit of the random variable X into the interval (a;b)
- A1
- B2
- C3
- D4
- E5
18115. The time (in hours) required to repair a machine is an exponentially distributed random
variable with parameter lyambda . Find the correctly calculated probabilities of the events.
- A1
- B2
- C3
- D4
- E5
19116. A random variable X is distributed under a normal law with mathematical expectation
a = 20. The probability of hit of the random variable X into the interval (10;30) is 0.6826.
Find the correctly calculated probabilities of the events.
- A1
- B2
- C3
- D4
- E5
20117. A normally distributed random variable X is given by the differential function:
. Find the probability of hit of the random variable X into the interval (a;b)
- A1
- B2
- C3
- D4
- E5
21118. Suppose that X is a normal law with mathematical expectation a = 5. The probability of hit of
the random variable X into the interval (9; ++++) is 0.1587. Find the correctly calculated
probabilities of the events.
- A1
- B2
- C3
- D4
- E5
22119. Assuming that the height of men of a certain age group is a normally distributed random
variable X with the parameters a = 173 sigma^2 = 36. Find the correctly calculated probabilities
of the events.
- A1
- B2
- C3
- D4
- E5
Información
- Descripción
- Test sobre Mat III, creado por hoffa HOFFMAN el 27/12/2019.
- Autor
- hoffa HOFFMAN
- Idioma
- English
- Visitas
- 21
- Historial
- Creado el 27 dic 2019 · actualizado el 28 dic 2019
- Valoración
- Aún sin valoraciones Valora este test