Data Management Module 6: Statistics Basics

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What is one of the primary roles of statistics in education?

Comparing the performance of different students

Determining the quality of a product

Predicting future outcomes

Providing information about a school's population change (correct)

What is the primary focus of descriptive statistics?

Analyzing the relationships between variables

Making predictions about future events

Drawing inferences about a population

Describing the characteristics of a group of data (correct)

What is the role of statistics in decision-making?

To aid in making informed decisions (correct)

To predict the outcome of a situation

To provide a definitive answer

To summarize data

In business, what is one of the ways statistics is used?

To control and maintain product quality Signup and view all the answers

What is the field of statistics that deals with drawing inferences about a population?

Inferential statistics Signup and view all the answers

What is the definition of statistics?

A body of knowledge that involves the use of scientific methods Signup and view all the answers

What is the formula for calculating the mean of a sample?

∑ / n Signup and view all the answers

What symbol is used to represent the population mean?

μ Signup and view all the answers

What is the purpose of arranging the data in order before finding the median?

To find the median Signup and view all the answers

What is the median of the data set 2, 4, 6, 8, 10?

6.5 Signup and view all the answers

What is the mean of the data set 10, 20, 30, 40, 50?

25 Signup and view all the answers

What is the symbol used to represent the median?

MD Signup and view all the answers

What is the purpose of finding the median?

To find the middle value Signup and view all the answers

What is the primary goal of descriptive statistics?

To provide summaries and describe the data at hand Signup and view all the answers

What is the formula for finding the median when the data set has an even number of values?

MD = (middle value + middle value) / 2 Signup and view all the answers

Which of the following is an example of an inferential statistics question?

Is there a significant difference in the academic performance of male and female students? Signup and view all the answers

What type of data is characterized by class intervals with corresponding frequencies?

Grouped data Signup and view all the answers

Which data gathering technique involves person-to-person exchange of data from the interviewer to the interviewee?

Direct interview method Signup and view all the answers

What is the primary distinction between primary and secondary data?

The source of the data Signup and view all the answers

What is the main purpose of using sampling techniques in statistics?

To make inferences from the data to more general conditions Signup and view all the answers

Which of the following is an example of descriptive statistics?

A researcher wants to find the average height of students in a class Signup and view all the answers

What is the main difference between inferential and descriptive statistics?

The purpose of the analysis Signup and view all the answers

What is the main purpose of a pie chart?

To compare the proportion of each category to the total Signup and view all the answers

What is the formula to convert frequencies into proportional parts of a circle for a pie chart?

Degree = (Frequency / Total) × 360 Signup and view all the answers

What type of data is suitable for a column or bar chart?

Discrete, grouped data of ordinal or nominal scale Signup and view all the answers

What is the primary use of measures of central tendency?

To describe a set of data with a single value Signup and view all the answers

How many degrees should the proportions in a pie chart sum up to?

360 Signup and view all the answers

What is the main difference between a pie chart and a column or bar chart?

The type of data they display Signup and view all the answers

What is the purpose of converting frequencies into percentages in a pie chart?

To make it easier to compare the proportions Signup and view all the answers

What are the three most commonly used measures of central tendency?

Mean, median, and mode Signup and view all the answers

What is the median number of tornadoes?

810 Signup and view all the answers

What happens to the median when there is an even number of values in the data set?

It falls between two given values Signup and view all the answers

What is the mode of a data set?

The value that occurs most often in the data set Signup and view all the answers

What is a data set called if it has two values that occur with the same greatest frequency?

Bimodal Signup and view all the answers

What is the mode of the data set: 401, 344, 209, 201, 227, 353?

There is no mode Signup and view all the answers

What is the weighted mean used for?

Finding the average of values with different frequencies Signup and view all the answers

What happens when a data set has more than two values that occur with the same greatest frequency?

It is multimodal Signup and view all the answers

What is the mode of the data set: 104, 104, 104, 104, 104, 107, 109, 109, 109, 109?

104 and 109 Signup and view all the answers