Statıstıcs I (ENG)
Ünite Sınavı Soruları
- 20 soru
- Soru metinleri açık; şıklar ve cevap anahtarı uygulamada
- 1
Data : 100, 120, 120, 180, 200. What is the sample standard deviation of this data ?
- 2
A farming company collected data about the amount of wheat (tons) sold in the last week to different companies. The data is as follows, 12, 35, 14, 25, 24, 40, 25. What is the mean of this data set?
- 3
Which of the following is generally demonstrated as P(m), where m is the number taking values between 0 and 100?
- 4
Which class interval does contain the median?
- 5
The measures of ________ are another kind of descriptive statistics and give information about the shape of distribution of the observations.
Which option completes the blank in the description above?
- 6
During a sales season, the fifteen salesmen in a computer company sold the following numbers of computers: 7, 11, 5, 12, 17, 6, 13, 9, 8, 4, 23, 12, 7, 6, 11.
Which of followings is the range of the number of sold computers?
- 7
Which of the following statements is true according to the box-plot given below?
- 8
The height of the students in a classroom are as follows;
155, 156, 157, 160, 162, 165, 170, 180.
Which of the following is the median of the given data?
- 9
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 50th percentile of the data?
- 10
Data : 20, 12, 16, 12, 10 ; what is the Pearson’s coefficient of skewness of these data ?
- 11
The standard deviation of the students’ performance scores data is 20. What is the variance of the data?
- 12
The frequency distribution table of the students’ performance scores of a school were constructed as follows. What is the sample mean of the data?
- 13
Data : 0.2, 0.5, 0.17, 0.22, 0.26, 0.34, 0.39, 0.44, 0.55, 0.87, 1.1, 1.14, 2.5, 2.9, 4.4, 5.6. What is the 80th percentile of this data ?
- 14
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?
- 15
Which of the following is not true about skewness?
- 16
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?
- 17
Which of the following information cannot be obtained from a box plot?
- 18
Which option gives the correct terms to complete the blanks given in the graph in the correct order ( from 1 to 4)?
- 19
Data : 12, 16, 10, 20, 12 ; what is the mean deviation of these data ?
- 20
The box plot is given above shows the data about the number of hours spent on watching tv a day by students in a school.
Which of the following is not correct about the box plot data?