Sampling, Data & Statistics

In probability sampling, which technique ensures every member has an equal chance of being selected?

Which of the following is not a standard type of data presentation?

What is the best description of data presentation?

What constitutes a population in research?

What is the main purpose of using a frequency distribution table?

The mode of a dataset is:

Which of the following is an example of ordinal data?

What is the purpose of data encoding?

In statistics, what does Q1 (First Quartile) represent?

What is an advantage of graphical presentation over textual presentation?

Which of the following is not a measure of central tendency?

In systematic sampling, how are samples selected?

What is a pie chart best used for?

What is the highest level of measurement that has a true zero point?

Why is stratified sampling used in research?

Which of the following represents secondary data?

What is the difference between mean and median?

How does tabular presentation differ from graphical presentation?

What distinguishes qualitative data from quantitative data?

What is the primary function of data analysis?

In the data set 5, 9, 12, 15, 18, what is the median?

If a student's exam scores are 75, 80, 85, 90, and 95, what is the percentile rank of 85?

Given the data set: 12, 18, 24, 30, 36, 42, 48, what is the mean?

A researcher wants to conduct a survey among high school students in a city. He divides the students by grade level (Grade 7, Grade 8, Grade 9, Grade 10) and selects a proportionate number from each grade. What sampling technique is used?

What does the first quartile (Q1) of a dataset represent?

Find the mode of the following data set: 3, 7, 7, 12, 15, 15, 15, 20, 22

A frequency distribution table shows that 10 students scored between 80-90 marks in a test. What does this indicate?

You are given the following dataset: 10, 20, 30, 40, 50. If the standard deviation is approximately 14.1, what does this tell you about the data?

If you want to visually represent the relationship between two numerical variables, which type of graph should you use?

A business analyst uses a line graph to show how sales have changed over five years. What insight does this graphical form provide?

A teacher collected quiz scores from 100 students and wanted to divide them into percentiles to see the distribution of performance. What should she do?

A health researcher is analyzing data on patient recovery times. The mean recovery time is 10 days, but the median is 8 days. What does this suggest?

You are given two datasets: Dataset A: {15, 20, 25, 30, 35} Dataset B: {10, 10, 10, 10, 50} Which dataset has a higher standard deviation?

A company conducts a survey on customer satisfaction. If 90% of respondents gave ratings between 4 and 5 (on a scale of 1 to 5), what measure of central tendency would best describe this dataset?

If a histogram shows a right-skewed distribution, what does this mean about the data?

Why is systematic sampling sometimes preferred over simple random sampling?

A study finds that as the number of study hours increases, exam scores also increase. What kind of relationship does this indicate?

A researcher is investigating the relationship between income level and spending habits. Which data collection method would provide the most reliable insights?

What is the interquartile range (IQR) useful for?

Which of the following would be an appropriate conclusion if a dataset’s mean is much higher than its median?

A researcher decided to use cluster sampling instead of simple random sampling. What is the main reason for this?

What does a scatter plot showing a downward trend suggest?

Why might a pie chart not be the best choice for presenting annual sales trends over five years?

A survey was conducted among employees to determine their job satisfaction on a Likert scale (1-5). What type of data is this?

A company collected data on customer spending habits and found extreme values (outliers) in the dataset. Which measure of central tendency is least affected by these outliers?

A data analyst is choosing between a bar graph and a histogram to represent data. When should a histogram be used instead of a bar graph?

If a scatter plot shows randomly scattered points with no clear pattern, what does this suggest about the relationship between the two variables?

A school principal wants to compare students' test scores before and after implementing a new teaching strategy. Which data presentation method would best show improvement over time?

In a study on student study habits, researchers surveyed only students from one school. What is a potential issue with this research method?

Why is it important to pilot test a questionnaire before conducting a full-scale survey?