Seçmeli Ara Sınav - Statıstıcs I

Soru 1:

In which of the following components and outcomes of a total frequency is shown as sectors of a circle?

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

Soru 2:

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?

A) Class Interval B) Frequency C) Cumulative Relative Frequency D) Cumulative Frequency E) The Percentage of Cumulative Relative Frequency

Soru 3:

Which of the following is used for Likert type items to visualize the contribution of each subgroup of a category?

A) Histogram B) Stem-and-leaf C) Stacked bar chart D) Simple bar chart E) Line chart

Soru 4:

What happens to arithmetic average of a data set if all observations are increased by 4?

A) It doesn't change. B) It increases by 4. C) It decreases by 4. D) It increases by 2. E) It decreases by 2.

Soru 5:

data is collected based on what is seen or heard researcher do not intervene to the subjects variables might be manipulated by the researcher Which of the above is/are the characteristics of observational studies?

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

Soru 6:

For an observation that results in values 6,7,3,4,3,5,6,6 what is the mode of this group?

A) 7 B) 6 C) 5 D) 4 E) 3

Soru 7:

Which of the following are not variables?

A) price B) blue C) radio stations D) color of hair E) age of tooth

Soru 8:

Which pie chart is the correct one to analyze the data presented in the table below?

A) B) C) D)

Soru 9:

According to the stem-and-leaf plot above, what is the range of the data?

A) 47 B) 49 C) 65 D) 402 E) 909

Soru 10:

Which one is TRUE about error in sampling?

A) It occurs when the researcher determines an inappropriate population from which to collect data. B) It can be described as any discrepancy between the actual result obtained andthe correct result that would be provided by an ideal procedure. C) It is caused by unknown and unpredictable factors that randomly affect measurementof the variable across the sample. D) It arises from problematic, poor calibrated or incorrectly used equipment. E) It arises from not representing the targeted population and the results yield biased or inaccurate information.

Soru 11:

Divides values as greatest digits and remaining digits Useful to visualize the range, outliers and most frequent values Useful to assess the spread of the distribution of the data Which of the following display types does these features belong to?

A) Dot plot B) Stem-and-leaf C) Bar chart D) Pie chart E) Histogram

Soru 12:

Which of the following is generally used to measure the attitudes of individuals towards a subject?

A) Open-ended questions B) Multiple responses C) Ranked responses D) Rated responses E) Ordered responses

Soru 13:

What is the mode of the following data set with frequency in paranthesis? 11 (3), 24 (2), 27 (3), 33 (2), 39 (4), 42 (3), 97 (2)

A) 26 B) 28 C) 39 D) 42 E) 108

Soru 14:

What is the arithmetic mean of the following data set with weights in paranthesis? 20 (10 %), 40 (20 %), 60 (30 %), 80 (40 %)

A) 15 B) 25 C) 30 D) 45 E) 50

Soru 15:

The chart below shows the relationship between humidity and temperature for 25 days. Which option is correct depending on the information on the chart?

A) The higher the temperature, the higher the humidity. B) The days with low humidity levels never have temperatures above 5 oC. C) The highest humidity levels are at temperatures above 10 oC. D) Total humidity levels for 25 days is the highest at temperatures between 0 C degrees and 2,5 C degrees. E) The days with high humidity tend to have temperatures at 2oC, 5oC, and 8oC.

Soru 16:

The graph represents the data of the number of vehicles registered in traffic by year. Purple line represents the 2017 data and maroon line represents the 2018 data. According to this graph, which of the following is the month when nearly equal number of vehicles are registered both in 2017 and 2018?

A) 2nd B) 10th C) 4th D) 2nd and 4th E) 1st and 2nd

Soru 17:

Which of the following is not true about stem and leaf display?

A) A stem-and-leaf display was invented by Tukey (1977) as a method of displaying data. B) A stem-and-leaf display is a type of graph for listing the numerical data. C) A steam and leaf display doesn't give information about the grouped frequency distribution of the data. D) A stem and leaf display is useful for assessing the location and spread of the distribution of the data. E) A stem and leaf display can be useful to figure out the range, outliers, the most frequent values and the shape of the data.

Soru 18:

Which statements below are correct about the table above? I Mark's weekly wage being 320 is a data set. II Being 56 years old male, Mark's earning 329 dollars per week is a case. III Mark's being male is a qualitative variable. IV Mark's being 56 years old is a qualitative data.

A) Only I B) II and III C) III and IV D) II, III and IV E) All of the above

Soru 19:

What type of variable is Aristotle’s logic’s truth which gets values true or false?

A) qualitative ordinal B) qualitative nominal C) continuous regular D) quantitative interval E) quantitative ratio

Soru 20:

Statisticians are the most sought-after professionals these days. The Statistician's mission is handling, analysing, interpreting and facilitating decisions from data. The principal reason why Statistics is a key necessity to humankind today is the massive amounts of available information. Which of the above statements about statistics is correct?

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