Deneme Sınavı Soruları

Which one below is NOT correct about histograms?

The variables are measured using an .............. scale, which not only shows the order but also shows the exact difference in the value.

Which type of scale should replace the blank space in the above sentence?

Students in a course get a grade, either "AA", "BA", "BB", or "BC", etc. What type of variable is the grade?

1. Can be drawn by hand easily while collecting data
2. Useful when observation count is less than 50
3. Generally used to investigate univariate data

Which of the following data display types do these features identify?

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

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?

What is the mode of the following data set with frequency in paranthesis?

15 (2), 30 (4), 35 (3), 40 (3), 95 (2)

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?

1. A researcher recorded the observed daily closing prices of several publicly traded common stocks for a financial study.
2. A sales manager of a company conducted a research about purchases of a specific product of the company.
3. 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?

The chart below shows the relation between humidity and temperature for a certain period of time. What type of relationship is there between temperature and humidity on the days the data recorded according to this chart?

What is the disadvantage of arithmetic mean?

A scientist is studying on the yearly average temperatures in Celsius in last 100 years. What measurement type is s/he studying on?

1. 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.
2. 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.
3. Data come in the form of numbers as well as text.
4. All observations can be reduced to some numerical quantity.
5. The way the sample is collected is crucial to obtaining a valid estimate.

Which of the above are correct?

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

Which of the following are not done by using statistics?

Self-reported data for high school students is presented in the table above. How many interval scales are there in the data set above?

Is your answer to this question data?

Which of the following is not big data?

Which of the following is not variable?