Statıstıcs I (ENG)
Deneme Sınavı Soruları
- 20 soru
- Cevap anahtarı açık: çöz, sonucunu gör
- 1
What is a central tendency measure of the probability distribution?
- 2
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?
- 3
I. f (x) ≥ 0 for all x.
II. the area under probability density function between points a and b is equal to 1
III. P(a ≤ X ≤ b) is equal to 1
Which of the statements should the probability density function satisfy?
- 4
During a sales season, the five salesmen in a mobile phone company sold the following numbers of mobile phone: 9, 15, 8, 24, 30. What is the range of the number of sold mobile phones?
- 5
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."
- 6
I. The complement of an event A is the set of all basic outcomes in S that do not belong to A.
II. The union of events A and B is the set of all elementary outcomes that belong to both sets.
III. The intersection of events A and B is the set of all elementary outcomes that belong to at least one of the sets A and B.
For A and B, which are any two events in a random experiment with sample space S, which of the statements are true?
- 7
Which of the following can be categorized as a discrete random variable?
- 8
Which of the following is generally demonstrated as P(m), where m is the number taking values between 0 and 100?
- 9
According to classical probability, when a fair dice is rolled, what is the probability of obtaining a number more than 4?
- 10
Which of the following is a discrete random variable?
- 11
The _______________ of a discrete random variable is a list of odds associated with each of its possible values.Which of the following is appropriate for filling in the blank above?
- 12
Which of the following is not true for normal distribution?
- 13
A engineer wants to choose the best company to work for. Before choosing the company, he classifies the companies according to their location and salary offered. There are 12 different locations and 10 different salaries. In how many different ways can companies be classified?
- 14
An employee is given a survey where he is given three options like "Agree", "Undecided", and "Disagree". What type of responses does he need to give?
- 15
What is Biostatistics ?
- 16
- A researcher recorded the observed daily closing prices of several publicly traded common stocks for a financial study.
- A sales manager of a company conducted a research about purchases of a specific product of the company.
- A university student who successfully completed the course filled out the assessment questionnaire about the lecturer.
What are the correct definitions of the data collection methods given above?
- 17
A researcher goes to a bus station and takes record of the number of people getting into a bus in that station everyday. Which type of data collection method is the researcher using?
- 18
"Twitter is an American microblogging and social networking service on which users post and interact with messages known as tweets" (https://en.wikipedia.org)
What type of data are tweets you write on Twitter?
- 19
- Any person have free access to data in the world
- Data may be in form of text or numbers
- All observations can be reduced to some numerical quantity
Which of the above is true for data?
- 20
A researcher wants to calculate the average income for a large group of people but he notices that there are a few extremely low and extremely high income levels. Thus he decides to find the average after eliminating the extreme values. In this case the researcher computes ........
Which of the following correctly fills in the blank in the sentence above?