Statıstıcs I (ENG)
Ünite Sınavı Soruları
- 20 soru
- Soru metinleri açık; şıklar ve cevap anahtarı uygulamada
- 1
How many different ordered arrangements of the four letters W,X, Y and Z are there?
- 2A manager in a company has two assistant directors. The probability that the older assistant director comes late to work on a given day is 0.07, whereas for the younger assistant director this probability is 0.05. In addition, the probability that both assistant directors come late to work on given day is 0.03. What is the probability that on a given day one or both assistant directors come late to work?
- 3
2 models will be selected to walk in a fashion show in France. There are 2 models from an Italian agency and 3 of them work for a Turkish agency. how many different possible outcomes are there?
- 4
According to classical probability, when rolling a fair dice, what is the probability of obtaining the number 5?
- 5
In ___________ approach, the researcher assigns a suitable value as the probability of the event.
Which of the following fills the blank correctly?
- 6
When is A and B, which are any two events in a random experiment with sample space S, can be said to be mutually exclusive?
- 7At a local district, there are three different pizza restaurants denoted here by A, B, and C. It is known that 40% of all customers give an order from company A, whereas 35% give an order from company B, and 25% give an order from company C. It is also known that 10% of the motorcycles from company A, 20% of the motorcycles from company B, and 5% of the motorcycles from company C need to a checkup before the next pizza delivery. What is the probability that a motorcycle returned to the restaurant needs a checkup before the next pizza delivery?
- 8
According to classical probability approach, what is the probability of obtaining a number less than 3 if we throw a six-sided fair die?
- 9
Which of the followings cannot be given as an example for random experiments?
- 10
Assume that 20 percent of Statistics course students in Anadolu University take Music course, 10 percent take Swimming course, and 4 percent take both Music and Swimming courses. What percentage of Statistics students neither take Music nor Swimming course?
- 11
When the occurrence or non-occurrence of an event A does not affect the occurrence of another event B, then we say that A and B are statistically ........ events?
- 12
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?
- 13
Which probability approach uses the relative frequencies to assign the probabilities to the events?
- 14
Which is NOT TRUE about a random experiment?
- 15
Which of the following terms define the set of all possible outcomes in a random experiment?
- 16
A manager of a café in a university campus assesses its customers as student, academic staff or visitor. She estimates that of all its customers 50% are students, 30% are academic staff and that 20% are visitors. It is known that purchases are made by 70% of student customers, by 60% of academic staff and by 30% of visitors. If a randomly chosen customer makes a purchase, what is the probability that this customer is a student?
- 17What is the probability of obtaining a number more than 3 if we throw a six-sided fair dice?
- 18
What can be said true about the basic concepts of probability?
- 19
I. P(AnB) = P(A⏐B)P(B) this formula is called the multiplication rule.
II. A and B are statistically independent if and only if P(AnB) = P(A)P(B).
III. For A and B sets independence can also be denoted by P(A⏐B)
- 20
According to classical probability, when a fair dice is rolled, what is the probability of obtaining a number more than 4?