Ünite Sınavı Soruları

In a market, a chef selects the first 5 vegetables he sees in the fresh vegetable boxes as her test samples. Which type of sampling method does the chef use?

In _______, every k^th element after a random starting point is taken.

In a factory there are 10,000 workers. %70 of workers are male. If we make a random sample of 200 proportional to the gender, how many of sample points should be female?

If you can assign a probability to each object in the population to be selected in to a sample, what kind of sampling is used?

Population of statistics students is 500, population of statistics 201 course is 150 (40 are repeating only this), population of statistics 203 course is 160 (55 are repeating only this), population of statistics 305 course is 140 (35 are repeating only this). How many people are there in the target population for a survey about repeating 2nd year courses?

A reseacher wants to analyse the consumption behaviors of people in a city. He divides the population into 4 groups: male/female and young/old. Then he estimates the proportion of each group in population and constructs the samples accordingly. So, which sampling method does he uses?

I. A population should be finite

II. Sometimes sample may be bigger than population

III. Using a proper sample surveyors may make very accurate prediction

Which one(s) of the above is/are true?

A researcher wants to conduct a survey on the mathematics scores of the Turkish students in Turkey. Which of the following can not belong to the sample choosen for this survey?

What is the difference between stratified and cluster sampling?

A researcher wants to collect data about drug users and knows a few of them. The researcher asks identified subjects to recruit other members and this process is repeated until the determined sample size is achieved. This researcher uses _______.

Which one of the following is not one of the reasons of sampling?

There are 40 observations in a population. A sample of 4 observations are to be selected randomly using a table of random numbers. Here are the the random numbers obtained from the table of random numbers: 55, 34, 67, 89, 12, 23, 89, 78, 18, 99, 92, 16, 45, and 10. In which random number given in this list, the process of selecting sample should be stopped?

In which sampling methods one uses stratums?

In which of the following sampling methods subgroups occur naturally (such as departments of a company)?

"In _________________ sampling method, the members, who are identified previously, are asked to identify other members of the population. As newly identified members name others, the sample is getting larger." Which of the following completes the blank in given sentence?

Which one of the following is also called availability sampling method?

In which reason of sampling we consider "Some populations are uncountable or infinite to conduct a census"?

A survey to search out the preferences of teenagers in Istanbul about novel selection was conducted accordingly: 80 girls and 80 boys, aged between 14-18, were asked the same questions such as the last novel they read, etc. For the design of the study, which is a wrong statement?