Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
The data set: [20,20,20,25,25,30,35,35,40,40,45,45] What is the interquartile range of the data set above?
- 2
Which of the followings cannot be given as an example for random experiments?
- 3
The probability of an event A is 0.6, the probability of an event B is 0.3. The probability that neither A nor B occurs is 0.25. What is the probability that both A and B occurs?
- 4
Data : 0.2, 0.5, 0.17, 0.22, 0.26, 0.34, 0.39, 0.44, 0.55, 0.87, 1.1, 1.14, 2.5, 2.9, 4.4, 5.6. What is the 80th percentile of this data ?
- 5
Pdf for continuous random variable X is defined as follows;
f (x) = 0.02, for 0 ≤ x ≤ 50. What is the mean of the continuous random variable X ? - 6
How many different ordered arrangements of the four letters W,X, Y and Z are there?
- 7
- Frequently used to model the time interval between two events
- It is essential to use consistent time units in the determination of probabilities
- The mean and the standard deviation of the distribution are equal
Which of the above is/are true for exponential distribution?
- 8
If there are 20 different departments and 5 different elective courses, in how many different ways can a student be classified?
- 9
Which of the followings is not true about cumulative distribution function?
- 10
During a sales season, the fifteen salesmen in a computer company sold the following numbers of computers: 7, 11, 5, 12, 17, 6, 13, 9, 8, 4, 23, 12, 7, 6, 11. What is the range of the number of sold computers?
- 11
Let's assume that three perfect coins are flipped three times, what is the probability that all the results are head?
- 12
Data format : (class, class interval, frequency, cumulative frequency) ; data : (1, 100 up to 200, 5, 5), (2, 200 up to 300, 10, 14), (3, 300 up to 400, 16, 30), (4, 400 up to 500, 20, 50), (5, 500 up to 600, 10, 60) ; what is the 40th percentile of these data ?
- 13
Consider that continuous random variable X is uniformly distributed and takes values between a and 19 and the mean value of μ=12.
Which of the following the standard deviation for the random variable X?
- 14
What is mode?
- 15

The graph represents the data of the number of vehicles registered in traffic by year. Purple line represents the 2017 data and maroon line represents the 2018 data. According to this graph, which of the following is the month when nearly equal number of vehicles are registered both in 2017 and 2018?
- 16
What is 'the most frequent value in the entire data set' called?
- 17
Which one below is NOT correct about histograms?
- 18
What type of variable is a girl’s answer to a marriage offer?
- 19
What is the median of the following data: 2, 4, 4, 4, 5, 6, 7, 7, 8, 10?
- 20
I- IQ levels (intelligence scale)
II- Weights of newborn babies
III-Monthly Income
IV-Types of blood such as A, B, AB and O
V-Level of Agreement: yes, maybe, noIn which of the variables given above, the level of measurement is ratio?