Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
In ___________ approach, the researcher assigns a suitable value as the probability of the event.
Which of the following fills the blank correctly?
- 2
X=x
1
2
3
4
P(X=x)
0,20
0,30
0,30
0,20
Which of the following is the variance of given data above?
- 3
In a discrete probability distribution, The sum of the probabilities of each outcome of the random variable must equal to ___________ ?
- 4
Which of the following is a discrete random variable?
- 5
What is the probability of flipping a coin 3 times but getting no head at all?
- 6
____________________ random variables have only a countable number of separate values such as 0, 1, 2 , 3... etc.Which of the following fills in the blank above?
- 7
In ______________ distribution, an outcome of a random experiment can be classified under two different categories.
- 8
I. It carries a unique numerical value.
II. It is determined by random probability experiment and its associated outcome
III. In statistical notation, random variables represented by lower case such as x and y.
Which of the following statements above are TRUE for random variables?
- 9
Consider the probability density function f(x)=0.025, for 20 ≤ x ≤ 60 and find the standard deviation of this function?
- 10
A random experiment is any process that leads to two or more possible outcomes, without knowing exactly which outcome will occur. Which one below is NOT an example of a random experiment?
- 11
Which of the following is not true about skewness?
- 12
The number of houses sold by each of the 10 estate agents during a particular 6 months period are 1, 4, 7, 6, 2, 10, 10, 3, 8, 9. What is the range of the data?
- 13
Data : 20, 12, 16, 12, 10 ; what is the standard coefficient of skewness of these data ?
- 14
What is the geometric mean of the numbers 4, 10, and 25?
- 15
How do we define a data set which has two modes?
- 16
According to the contingency table below, what are the percentage of male and female respectively within the people who do not have technical knowledge (No)?
- 17
- Typically used to compare counts, frequencies, categories etc.
- Represents the frequencies with rectangles by their lengths
- Depending on the variable type, it is possible to create many types of it
Which of the following do these features represent?
- 18
What type of a graphic is used to investigate the relationship between two variables?
- 19
Is your answer to this question data?
- 20
There are 85 people interviewed on their weekly salary. If the frequency for Class 2 is 21 what is the percentage of relative frequency?