Seçmeli Ara Sınav - Statıstıcs I

Soru 1:

The figure above is a dot plot showing Mathematics grades in class A by gender. Which of the statements is not correct depending on the information above?

A) The highest grade of males is 70. B) The highest grade of females is 90. C) There are more female students than the male students in class A. D) There are groupings around 60 and 70 in male students. E) There are groupings around 60 and 75 in female students.

Soru 2:

What is the midrange of the following data set with frequency in paranthesis? 14 (2), 34 (4), 38 (3), 44 (3), 96 (2)

A) 96 B) 55 C) 34 D) 26 E) 14

Soru 3:

Which of the following is not true about histogram?

A) A histogram is drawn for continuous data. B) In order to draw the histogram of the data, a large sample is needed. C) A histogram gives information about the centre, shape and symmetry of the data. D) A histogram can also be used to check out the normality. E) A histogram doesn't give information about the peaks and extreme values.

Soru 4:

I. the shape of the distribution of the data II.the relation between two sets of data III.the most repeating observations Which of the things above a properly created graph can report in a visual form?

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

Soru 5:

Element Variable Concept Case Which of the above are the key components of a data set?

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

Soru 6:

"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?

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

Soru 7:

To prove that aspirin is the cause of the improvement in health, what type of research needs to be conducted?

A) case B) observation C) statistical D) experiemental E) report

Soru 8:

Consider the pie chart constructed based on the data presented above. What is the angle of the studying?

A) 120 degrees B) 90 degrees C) 60 degrees D) 45 degrees E) 30 degrees

Soru 9:

A researcher recorded the observed daily closing prices of several publicly traded common stocks for a financial study. A sales manager of a company conducted a research about purchases of a specific product of the company. A university student who successfully completed the course filled out the assessment questionnaire about the lecturer. What are the correct definitions of the data collection methods given above?

A) I-Observation method, II-interview method, III-self-enumeration method B) I-interview method, II-observation method, III-enumeration method C) I-self-enumeration method, II-interview method, III-observation method D) I-observation method, II-self-enumeration method, III - interview method E) I-interview method, II-enumeration method, III- observation method

Soru 10:

For an observation that results in values 6,7,3,4,3,5,6 what is the 30% Winsorized mean of the group?

A) 2 B) 3 C) 4 D) 5 E) 6

Soru 11:

Which of the following is preferably used to visualize a trend of continuous data over time?

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

Soru 12:

An advertisement company conducts a survey on parfume preferences of adults in a city. The researcher collects a sample of 200 people of whom 170 are male. What type of error does the researcher make?

A) Error in population spesification B) Error in measurement C) Error in sampling D) Error in modelling E) Error in analyzing

Soru 13:

Customers asked to respond to the following statement. “The picture quality of your TV is satisfactory”. Customers responded to the statement as 1=Strongly Disagree, 2=Disagree, 3=Undecided, 4=Agree, and 5=Strongly Agree. If the measurement categories and the number of responses within a given measurement category are used, what method of data organization is implemented in the case specified above?

A) Raw data B) Grouped Frequency Distribution Table C) Frequency Distribution Table D) Cumulative Frequency Distribution Table E) Relative Frequency Distribution Table

Soru 14:

Your professor is surveying you and asking your gender, hometown and branch. What form of data is s/he dealing with?

A) nominal B) ordinal C) interval D) ratio E) continuous

Soru 15:

Which of the following is FALSE about histogram ?

A) It is very similar to a bar chart. B) It shows continuous data. C) It is drawn for qualitative data. D) It can tell about the peaks and extreme values. E) It helps us to identifty the symmetry of the data.

Soru 16:

A researcher goes to a bus station and takes record of the number of people getting into a bus in that station everyday. Which type of data collection method is the researcher using?

A) Interview B) Observation C) Self-Enumeration D) Questionnaire E) Sampling

Soru 17:

Can be drawn by hand easily while collecting data Useful when observation count is less than 50 Generally used to investigate univariate data Which of the following data display types do these features identify?

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

Soru 18:

Which of the following statements is true?

A) Mean of a left-skewed distribution is larger than the mode of it. B) Median of a left-skewed distribution is larger than the mode of it. C) Mean of a right-skewed distribution is smaller than the mode of it. D) Mode and median of a normal distribution are larger than its' mean. E) Mean, mode and median of a normal distribution are equal.

Soru 19:

What is the arithmetic mean of the following data? (2, 4, 5, 6, 7, 8, 9, 9, 9, 14)

A) 3.3 B) 4.3 C) 5.3 D) 7.3 E) 10.3

Soru 20:

What is the geometric mean of the following data set? 8, 27, 64

A) 18 B) 24 C) 25 D) 33 E) 36