Deneme Sınavı Soruları

Pdf for continuous random variable X is defined as follows;
f (x) = 0.02, for 0 ≤ x ≤ 50. What is he variance of the continuous random variable X?

What is the variance of the probability distribution given above?

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 ?

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?

Suppose that random variable X has exponential distribution with λ=a. Find the probability of P (X ≥ b) ?

I. The central tendency measure of the distribution 

II. A measure of the variability of the observations

III. The information of the distribution shape

Which pieces of information given above can be obtained from a box-plot?

A bakery employs 10 people. The number of years’ experience that the employees of the company have is the following: 0, 0, 2, 4, 5, 8, 15, 17, 20, 24. What is the interquartile range of the data?

Which of the following is a discrete random variable?

I. 0 ≤ F (x) ≤ 1

II.  If x₁ ≤ x₂ then F (x₁) ≤ F (x₂)

III.  If x₁ = x₂ then F (x₁) = F (x₂)

Which of the given statements are considered the properties of the cumulative probability function?

The exam points of the students in a math course are as follows;

45, 53, 67, 74, 88, 88, 95, 95, 100.

Which of the following is the sample standard deviation of the data?

Which one below is NOT an example of a continuous random variable?

Probability density function for continuous random variable X is defined as follows;

f (x) = 0.02, for 0 ≤ x ≤ 50.

Which one below is the probability of P (X < 20)?

In a research investigating the effects of playing online games on aggressive behavior, 100 teenagers are observed. What statistical term represents these 100 teenagers in this particular experiment? 

The number of workers in a certain factory is given below. What is the cumulative frequency of of workers whose age is less than 50?

1. The relation between two sets of data
2. The most repeating observations
3. Summary statistics (min, max, mean, median etc.)

Which of the above could be identified using graphics?

For an observation that results in values 6,7,3,4,3,5,6 what is the midrange arithmetic mean of the group?

In a research investigating the effects of playing online games on aggressive behavior, 40 teenagers at the age of 10 plays 4 hours of violence games and 40 teenagers at the age of 10 does not play any video games. What type of research is this research?

1. A group of tourists entering Turkey
2. Which country they come from
3. How many days they plan to stay
4. What their tourism objectives are

Which of the above is/are case(s)?