Seçmeli Ara Sınav - Statıstıcs I

Soru 1:

As a general rule, most data on monetary values and those coming from physical measurements (e.g., lira, gold price, centimeters, kilograms) are _____ variables. Which of the following options fills the blank in the above sentence in the most correct way?

A) Interval-scale B) Nominal-scale C) Ratio-scale D) Ordinal-scale E) Categorical-scale

Soru 2:

The frequency distribution table of the students’ performance scores of a school were constructed as follows. What is the ratio of the students whose score under 80?

A) 0,88 B) 0,84 C) 0,80 D) 0,73 E) 0,70

Soru 3:

Retrieved from https://ourworldindata.org/quality-of-education The following plot represents the relation between the PISA reading scores and the United Nations' Human Development Index (HDI) for a select group of countries. According to the scatterplot above and considering straight line that indicates relationship, which one of the following is true?

A) The straight line tends to have positive slope B) The straight line tends to have negative slope C) No relationship can be claimed between two sets of data D) Straight line to indicate the negative correlation between two sets of data. E) The is not any outlier data for statistical analysis.

Soru 4:

Which of the following is an internal data source for the firm?

A) Reference books B) Newspapers C) Sectoral magazines D) Statistics published by governments E) Firm’s accounting records

Soru 5:

The main criteria for selecting a sample will be that the sample is representative of the population and that there is no or very little subjectivity in the choice of the sampling units. Sampling is not only conducted by survey researchers on human populations, but also by auditors on a company’s accounts, by agricultural researchers on different pieces of land, and by quality control inspectors on products in a factory, to name only a few examples. Data come in the form of numbers as well as text. All observations can be reduced to some numerical quantity. The way the sample is collected is crucial to obtaining a valid estimate. Which of the above are correct?

A) I and II B) I, II and III C) III, IV and V D) I, II, IV and V E) I, II, III, IV and V

Soru 6:

It is the best measure of central tendency for nominal data. It is the middle value of an ordered dataset. It can be preferred when the distribution is skewed. Which of the given above true about median?

A) Only II B) I & II C) I & III D) II & III E) I, II & III

Soru 7:

A market researcher's surveying customers A teacher's qualitative inquiry of motivation A psychologist's measure of addiction level Which of the above is/are basic interest of statistics?

A) Only II B) I and II C) I and III D) II and III E) I, II and III

Soru 8:

Which of the following can be used to display the trends in continuous data over a period of time?

A) Pie chart B) Line chart C) Frequency polygon D) Bar chart E) Stem and leaf display

Soru 9:

"It is almost the easiest of the graphs. It can be drawn by hand easily while collecting data. It will be very useful when the number of objects in our study is rather small such as up to 50 observations. It is generally used to investigate univariate (quantitative) data, but sometimes it is used to compare two variables. Essentially it is a one-dimensional scatterplot of observed values of a variable." Which type of graphic is described in the paragraph above?

A) Pie chart B) Line chart C) Dot plot D) Histogram E) Bar chart

Soru 10:

Which statement below is correct about the table above?

A) "Gender" is a quantitative data. B) "Stephen" is a data set. C) "Ronnie" is a qualitative data. D) "Age" is a qualitative data. E) "Susan" is an element.

Soru 11:

Which one of the following is an example of central tendency measures?

A) Variance B) Mode C) Range D) Standard deviation E) Correlation coefficient

Soru 12:

The observations made on the variables constitute the data. The subjects or individuals or companies on which these observations are made are called cases. Categorical variables and data can be either nominal or ordinal. Continuous variables and data can be either interval-scale or ratio-scale Which of the above are correct?

A) I and II B) I and III C) I, II and III D) II, III and IV E) I, II, III and IV

Soru 13:

Which of the following is not true about the scatter plot?

A) Scatter plot is used to investigate the change of a variable over a time. B) To construct a scatter plot, two data sets or variables are needed, usually, these two data sets or variables are named as X and Y. C) The pair of the data point for a specific observation, (X, Y), is represented by a dot or a symbol of convenience. D) Scatter plot gives a good indication of the correlation between two variables. E) Scatter plot is a good indicator of the value of the correlation coefficient.

Soru 14:

Which one below is a term that has the same meaning the with the term Statistics?

A) Data Science B) Database Management C) Data Visualization D) Computer Science E) Analytics

Soru 15:

Which type of response does the question above require?

A) Open-ended response B) Multiple response C) Ranked response D) Rated response E) Clarity response

Soru 16:

What is the arithmetic mean of the following data set with weights in paranthesis? 60 (10 %), 50 (15 %), 70 (25 %), 90 (30 %), 80 (40 %)

A) 50 B) 30 C) 25 D) 20 E) 18

Soru 17:

We ask the students to number the most important language skill for them in their academic classes as 1 and the least important one as 2. Which option below best describes this measurement?

A) Ordinal scale B) Nominal scale C) Interval Scale D) Ratio Scale E) None of the above

Soru 18:

What is the geometric mean of the following data set? 64, 125, 216

A) 96 B) 105 C) 120 D) 128 E) 144

Soru 19:

Any person have free access to data in the world Data may be in form of text or numbers All observations can be reduced to some numerical quantity Which of the above is true for data?

A) Only I B) I and II C) I and III D) II and III E) I, II and III

Soru 20:

Which of the following refers to ' the average of a set of numbers in the data'?

A) Median B) Mode C) Mean D) Central tendency E) Ratio