Deneme Sınavı Soruları

At 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. If a motorcycle returned to the company needs a checkup before the next pizza delivery, what is the probability that this motorcycle was owned by company A?

1. Arithmetic mean
2. Standard deviation
3. Variance 

Which of the above determine(s) the shape of the normal random variable?

Which of the followings are not correct related to probability density function?

In a study about employess, employees are classified according to the department they work in and their preference of training coursec. If there are 12 different departments and 7 different courses, in how many different ways can an employee be classified?

"__________is a widely employed discrete probability distribution in statistics where a set of independent observations constitutes exactly two disjoint outcomes of a trial."

Which option completes the definition given above?

In a discrete probability distribution, The sum of the probabilities of each outcome of the random variable must equal to ___________ ?

Consider the probability density function f(x)=0.025, for 20 ≤ x ≤ 60 and find the standard deviation of this function?

The frequency distribution table of the students’ performance scores of a school were constructed as follows. What is the sample mean of the data?

I. The exponential random variable is frequently used to model the time interval between two events. 

II. The exponential random variable is defined with a parameter λ.

III. The exponential random variable X defines the time interval between two independent events.

Which one of the given statements can be said to be true about exponential distribution?

The standard deviation of the students’ performance scores data is 20. What is the variance of the data?

Events A, B, and C are all independent and that B and C are mutually exclusive events. P(A)=0.04, P(B)=0.03, and P(C)=0.02. What is the probability that events A and B will occur or A will not occur and C will occur?

Which one below is a type of bar chart where each bar is divided into subgroups proportional to the contribution a subgroup makes to associated bar?

....................  is the combination of statistics, mathematics, programming, problem-solving, capturing data in ingenious ways, the ability to look at things differently, and the activity of cleansing, preparing, and aligning the data.

What is the correct concept for the sentence above?

Is your answer to this question variable?

For an observation that results in values 6,7,3,4,3,5,6,6 what is the mode of this group?

Which scales of measurement have the properties of classifying, magnitude, and equal ­intervals?

What happens to arithmetic average of a data set if all observations are increased by 4?