Statıstıcs I Çıkmış Sorular, Online Deneme Sınavları, Çalışma, Dersler, Sınava Hazırlanma, vize, final

Soru 1:

Which of the following is the most important and widely used measure of variability in statistics?

A) Range B) IQR C) Standart Deviation D) Box Plot E) Skewness

Soru 2:

The _______________ of a discrete random variable is a list of odds associated with each of its possible values?

A) ratio B) probability distribution C) continuous distribution D) sum distribution E) elevated ratio distribution

Soru 3:

What is the probability of obtaining a number more than 3 if we throw a six-sided fair dice?

A) 0,5 B) 0,6 C) 0,7 D) 0,8 E) 0,9

Soru 4:

The normal distribution is one of the most significant and extensively used continuous probability distribution because ... Which of the following correctly concludes the sentence above?

A) probability density function for normal random variable is easier to apply B) real life applications are approximately normally distributed C) normally distributed random variables are represented using two parameters D) the mean of a normal random variable can have both positive and negative values including zero E) standart deviation of the normal random variable can have both positive and negative values

Soru 5:

In Binomial distribtuion, Each trial has only_________ possible outcomes?

A) One B) Two C) Three D) Four E) Five

Soru 6:

Which one is broadly used in various real life applications especially for acceptance sampling in quality control?

A) Hypergeometric distribution B) Binomial distribution C) Poisson distribution D) Arithmetic mean E) Cumulative distribution

Soru 7:

Which of the following is a continuous random variable?

A) The number of new cases of influenza in a particular city in a month B) The number of accident-free days in a year at a building site C) The amount of rain recorded at an airport in a week D) The number of passengers in a bus on a highway at rush hour E) The number of clerical errors on a medical chart

Soru 8:

The number of the book read by the students in a year as follows; 10,11,11,12,14,17,18,19,20. What is the range of the given data above?

A) 11 B) 12 C) 10 D) 14 E) 15

Soru 9:

Random variable X has normal distribution, mean μ=25 and variance σ 2 =16. Determine the probability P (30 ≤ X ≤ 35) in terms of standard normal distribution?

A) P(0.25 ≤ z ≤ 0.75) B) P(0.50 ≤ z ≤ 1) C) P(0.25 ≤ z ≤ 1.5) D) P(1 ≤ z ≤ 2) E) P(1.25 ≤ z ≤ 2.5)

Soru 10:

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, 18 Which of the followings is the sample mean of the city A?

A) 1.3 B) 2.3 C) 3.3 D) 4.3 E) 5.3

Soru 11:

In a data set, what is the difference between the largest and smallest values called?

A) Range B) Frequency C) Variance D) Skewness E) Standard Deviation

Soru 12:

If there are 20 different departments and 5 different elective courses, in how many different ways can a student be classified?

A) 100 B) 150 C) 200 D) 250 E) 300

Soru 13:

Which of the following is not correct about bar charts?

A) The information about several subgroups of each category can be also shown by a grouped bar chart. B) A bar chart is the graphical representation of frequencies by rectangles (or bars) with lengths (or heights) proportional to the frequencies of observations. C) A simple bar chart is used to represent continuous values for each category. D) A stacked bar chart is a bar chart where each bar is divided into subgroups proportional to the contribution a subgroup makes to an associated bar. E) Bar graphs are typically used to compare counts, frequencies, the number of categories, objectives, amounts.

Soru 14:

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

A) 14 B) 25 C) 35 D) 48 E) 93

Soru 15:

Which of the following is not a continuous random variable?

A) amount of rainfall in Eskişehir B) number of university students in Eskişehir C) flow rate of Porsuk river D) length of streets of Eskişehir E) flight height of owls over Anadolu University

Soru 16:

2 models will be randomly 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. If the event “one Turkish model X and one Italian model Y is chosen” is denoted by E, what is the probability that event E occur?

A) 0.4 B) 0.5 C) 0.6 D) 0.7 E) 0.07

Soru 17:

Which is TRUE aboout the classical probability?

A) Uses the relative frequencies to assign the probabilities to the events B) It is based on experiments C) The assumption is that the outcomes have the same chance of happening D) The researcher assigns a suitable value as the probability of the event. E) A personal judgement comes in to play to assign the probability.

Soru 18:

A call center receives, on average, 6 calls per minute and number of calls follows a Poisson distribution. What is the probability of receiving at most 2 calls at a given minute?

A) 0.062 B) 0.044 C) 0.028 D) 0.014 E) 0.006

Soru 19:

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. What is the probability that a motorcycle returned to the restaurant needs a checkup before the next pizza delivery?

A) 0,12 B) 0,14 C) 0,16 D) 0,18 E) 0,20

Soru 20:

Find out the range in the following data set: 10,15,20,25,30,35,40,45,50,55,60

A) 50 B) 51 C) 52 D) 53 E) 54