Deneme Sınavı Soruları

20 soru
Cevap anahtarı açık: çöz, sonucunu gör

0 doğru · 0 yanlış · 20 kaldı

1
A farming company collected data about the amount of wheat (tons) sold in the last week. The data is as follows, 12, 35, 14, 25, 24, 40, 25. What is the standard deviation of the data set?
2
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?
3
A sample data set is given as follows; [14,15,15,16,17,18,20,21,22]

Which of the following is the Pearson’s coefficient of skewness (PCS) value of the sample data set given above?
4

Probability density function f (x) of normal distribution has the following property;

f (x) ≥ 0 for all x values

Which of the statements explains the property above?
5
What is mode?
6
Data : 4, 4, 5, 5, 5, 15, 15, 18, 19, 15, 4, 5, 14, 14, 17, 17, 26, 26, 22, 22. What is the range of this data ?
7
Which option is NOT correct about the probability density function?
8

X=x

1

2

3

4

P(X=x)

0,20

0,30

0,30

0,20

Which of the following is the standard deviation of the given data above?
9
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 B?
10

The sample standard deviation and the sample variance for a frequency distribution can be calculated as follows.

s= ∑k fi(xi−X)2 i=1 n−1

s=∑k fi(xi−X)2 2 i=1 n−1

Which of the followings is not true related to this formula?
11

X=x

1

2

3

4

P(X=x)

0,20

0,30

0,30

0,20

Which of the following is the mean of given data above?
12
Which one is broadly used in various real life applications especially for acceptance sampling in quality control?
13
A mixed basketball team (5 players) will be chosen from 8 male and 7 female players. This team should consist of at least 2 female and at least 2 male players, how many different teams are possible?
14
In a salary data example, the frequency table shows that there are 20 workers of whose weekly salaries are between 415 and 525 dollars. Which of the below should we use if we need to know, for example, how many workers earn under 525 dollars?
15
Which of the following is used for Likert type items to visualize the contribution of each subgroup of a category?
16
I- Students' GPAs
II-Political parties
III- Educational level

What type of variable are the ones described above?
17
Which one of the following is an example of central tendency measures?
18
What type of data presentation method is described in the sentences below?

It is useful to determine a vague point for location of center and spread of data.

It is not useful for large sizes of data.

To use this type of plot, one needs to identify the lowest and the highest value of the data set first.
19
"It is often used to display the trends in a continuous data over a period of time. It also works well with discrete (ordered) or categorical types of data. It is constructed by intersecting the points by lines on the x-axis. Some of them are used to draw in two or three dimensions. Additionally, some of them are very helpful to show the relationships for multivariate data."

What kind of a graphic is described in the paragraph above?
20
1. Experimental study is a study in which the researcher manipulates some of the variables and try to determine how the manipulation influences other variables.
2. In an observational study, researchers simply collect data based on what is seen and heard and infer based on the data collected.
3. In an observational study, one or more independent variables are controlled so as to obtain information about their influence on the dependent variable.
Which of the above statements are true?

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Yeni yılların sınavlarını da çözStatıstıcs I (ENG) dersinin tüm sınavları, cevap anahtarları, süreli mod ve yanlış analizi uygulamada.Uygulamada aç

X=x	1	2	3	4
P(X=x)	0,20	0,30	0,30	0,20

X=x	1	2	3	4
P(X=x)	0,20	0,30	0,30	0,20