แบบทดสอบเรื่องสถิติ

The given correct answer suggests that good information and news should be accurate, up-to-date, and reliable. It should be considered trustworthy and popular. Additionally, it should be based on interviews with knowledgeable individuals.

There are two types of statistics: descriptive statistics and inferential statistics. Descriptive statistics involves organizing, summarizing, and presenting data in a meaningful way, such as through measures of central tendency and dispersion. Inferential statistics involves making predictions or inferences about a population based on a sample of data.

The correct answer is "ข้อมูล" because it refers to information or data that can be used to describe or analyze a situation or condition. The other options, "ประชากร" (population) and "สถิติ" (statistics), are specific types of data that can be used as part of the overall information or data.

The question asks for the option that represents qualitative data. Qualitative data refers to information that is descriptive in nature and cannot be measured or counted. In this case, the option "เพศของคนในครอบครัว" (gender of the people in the family) represents qualitative data as it describes the characteristics or qualities of the individuals in the family rather than providing numerical or measurable information.

The question asks for quantitative data, which refers to numerical measurements or quantities. "ความดันโลหิตของคน" (blood pressure of people) is a quantitative data as it involves measuring and recording numerical values. On the other hand, "เลขประจำตัวนักเรียน" (student ID number), "หมายเลขโทรศัพท์" (phone number), and "ขนาดของเสื้อนักเรียน" (size of student's shirt) are not quantitative data as they do not involve numerical measurements.

The given set of data is arranged in ascending order: 11, 23, 32, 41, 51, 59, 72, 84, 91. The P50, also known as the median, is the middle value in a set of data. Since there are 9 values in the set, the middle value would be the 5th value, which is 51. Therefore, the correct answer is 51.

The correct answer states that "การสำมะโน (Sampling)" refers to collecting data from every unit of the population or the thing we want to study. This means that we collect information from every individual or item in the population of interest, rather than just a selected sample.

The given data set is: 3, 4, 2, 7, 9, 4, 5, 7, 4, 6. To find the median, we need to arrange the data in ascending order: 2, 3, 4, 4, 4, 5, 6, 7, 7, 9. Since the data set has an even number of values, the median is the average of the middle two values, which are 4 and 5. Adding them and dividing by 2 gives us 4.5. Therefore, the median of the given data set is 4.5.

The correct answer is "Population" because the question is asking how we refer to the data that is collected and analyzed from all the available information. The term "Population" is commonly used in statistics to describe the entire set of individuals or objects that are of interest in a particular study or analysis.

The given set of numbers is 23, 59, 11, 41, 72, 32, 51, 84, 91. To find the average, we sum up all the numbers and divide by the total count. Adding up all the numbers gives us 454. Since there are 9 numbers in the set, dividing 454 by 9 gives us an average of 50.44. Therefore, the correct answer of 51.56 is not accurate.