Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
A petrol company collected the data about the amount of fuel (tons) sold on two cities in a given Saturday. In each city the company has ten gas stations. The data is as follows.
City A: 3, 5, 6, 2, 7, 9, 8, 1, 4, 8
City B: 1, 4, 6, 2, 7, 19, 8, 1, 2, 18Which of the followings is the sample mean of the city A?
- 2
Probability density function for continuous random variable X is defined as follows;
f (x) = 0.05, for 0 ≤ x ≤ 30.
Which of the following is the standard deviation of this function?
- 3
Consider the probability distribution for the random variable X given below and determine the probability of P (1.5 < X ≤ 4) =?
- 4
The measures of ________ are another kind of descriptive statistics and give information about the shape of distribution of the observations.
Which option completes the blank in the description above?
- 5
The height of the students in a classroom are as follows;
155, 156, 157, 160, 162, 165, 170, 180.
Which of the following is the median of the given data?
- 6
Which of the following is not true about range?
- 7
What does this equation tell us? - 8
In how many different ways can the letters in T H A N K S be arranged?
- 9
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)?
- 10
60 % of students take Statistics 2 course after Statistics 1 course. 25 % of students takes Statistics 2 course without taking Statistics 1 course. What is the probability that a student who takes Statistics 2 course has not taken Statistics 1 course?
- 11
Which one can be defined as a rule that assigns probabilities to the values of random variables?
- 12
According to classical probability, when rolling a fair dice, what is the probability of obtaining the number 5?
- 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
- The first role of Statistics is to reduce this mass of complex data to a simpler form in order to facilitate understanding and learning from the data.
- Words, SMSs, tweets, social media posts, verbal responses in questionnaires, these can all be treated as data.
- Climate data, measurements from tens of thousands of weather stations across the world, is an example of big data.
Which of the above statements related to the data is correct?
- 15
The size of a ......I..... is always less than the size of the ......II....... from which it is taken.
Which of the following terms correctly completes the sentence above?
- 16
Which of the following is a nominal scale type data?
- 17
What is the mode of the following data set?
14, 17, 22, 2, 25, 4, 14, 6, 35, 93, 11, 14, 25, 18, 18, 25, 20, 14, 14, 48, 18, 25, 48
- 18
The above table contains the daily sales data of a market. We want to construct relative frequency distribution table for the data. What is the first class’ relative frequency?
- 19
Customers asked to respond to the following statement. “The picture quality of your TV is satisfactory”. Customers responded to the statement as 1=Strongly Disagree, 2=Disagree, 3=Undecided, 4=Agree, and 5=Strongly Agree.
If the measurement categories and the number of responses within a given measurement category are used, what method of data organization is implemented in the case specified above?
- 20
A researcher believes that playing piano is the explanation for increased mathematics academic success. In order to get an understanding on this, the researcher collected data by conducting a survey, asking elementary students his or her level of math ability (grades) and whether they play a piano or not.
Which of the following statements about the research is wrong?