Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
Which one is frequently used to summarize the features of probability distributions for a discrete random variable X?
- 2
For which of the following, does the probability density function f (x) of the continuous random variable X take a constant value over the range of the random variable X is defined?
- 3
Data format : (class interval, frequency) data : (100 up to 120, 1), (120 up to 180, 2), (180 up to 200, 1), (200 up to 250, 1). What is the sample standard deviation of these data ?
- 4
What is the area below the probability density function f (x) = 0.1, for 0 ≤ x ≤ 20 ?
- 5
For two sets A and B the probability of A is 0.15 and the probability of B is 0.25 if P(A|B) is equal to 0.30 what is the value of P(B|A)?
- 6
The sample standard deviation and the sample variance for a frequency distribution can be calculated as follows.
s= ∑k fi(xi−X)2 i=1 n−1
s=∑k fi(xi−X)2 2 i=1 n−1
Which of the followings is not true related to this formula?
- 7
Consider the probability distribution for the random variable X given below and determine the probability of P (1.5 < X ≤ 4) =?
- 8
A sample data set is given as follows; [14,15,15,16,17,18,20,21,22]
Which of the following is the Pearson’s coefficient of skewness (PCS) value of the sample data set given above?
- 9
Which of the following is not true about percentiles?
- 10
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?
- 11
Find out the range in the following data set: 10,15,20,25,30,35,40,45,50,55,60
- 12
Which of the followings cannot be given as an example for random experiments?
- 13
Which of the following is a feature of Bayes’ Theorem?
I.Using Bayes’ Theorem, we can find the probability that a defective item is produced by a particular machine.
II.It enables us to compute a particular conditional probability.
III. It is defined as the arrangements of a finite number of distinct objects.
- 14
Consider the pie chart constructed based on the data presented above. What is the angle of the studying?
- 15
The graphic above shows the frequency distribution of five continents being visited by 15 people.
What kind of a graphic is used to show the frequency distribution in the figure above?
- 16
What is the arithmetic mean of the following data set with weights in paranthesis?
20 (10 %), 40 (20 %), 60 (30 %), 80 (40 %)
- 17
Which of the following is not true about histogram?
- 18
In this type of measurement scale, there is a natural or zero-valued base value that cannot be changed. What is the name of this scale?
- 19
According to the stem-and-leaf plot above, what is the range of the data?
- 20
To prove that aspirin is the cause of the improvement in health, what type of research needs to be conducted?