Statıstıcs I (ENG)
Ünite Sınavı Soruları
- 20 soru
- Soru metinleri açık; şıklar ve cevap anahtarı uygulamada
- 1
What is the set for the possible values of the random variable stated below?
"The number of coins that match when three coins are tossed at once."
- 2
Which of the following is a discrete random variable?
- 3
What must be the value of k if the table above is a probability distribution table of variable X?
- 4
Which one can be defined as a rule that assigns probabilities to the values of random variables?
- 5
What must be the value of "a" if the table above is the probability distribution of variable X whose mean is 2.8?
- 6
In ______________ distribution, an outcome of a random experiment can be classified under two different categories.
- 7
Let's assume that three perfect coins are flipped three times, what is the probability that all the results are head?
- 8
What is the mean of variable X, given the probabilty distribution above?
- 9
I. The time a person spends on reading a day
II. The amount of water a person drinks a day
III. The weight gain of a person in a month
Which of the variables given above are examples of a continuous random variable?
- 10
Which of the following is a discrete random variable?
- 11
Some of the illustrations of random variables that generally conform to model by means of Poisson distribution are presented below.Which illustration does NOT conform to this model?
- 12
Which of the following is a continuous random variable?
- 13
There are 6 red and 4 blue balls in a box. One randomly chooses 4 balls from the box without replacing it. What is the probability of choosing at most 1 red ball out of these 4 balls?
- 14
In a discrete probability distribution, The sum of the probabilities of each outcome of the random variable must equal to ___________ ?
- 15
What is mean score?
- 16
What is the arithmetic mean of the following discrete probablity distribution?
- 17
X=x
1
2
3
4
P(X=x)
0,20
0,30
0,30
0,20
Which of the following is the mean of given data above?
- 18
A call center receives, on average, 6 calls per minute and number of calls follows a Poisson distribution. What is the probability of receiving at most 2 calls at a given minute?
- 19
What is range?
- 20
Which one is frequently used to summarize the features of probability distributions for a discrete random variable X?