1.
A ___ is a ratio of equivalent numbers with different units that is used to change a measurement from one unit to another.
Correct Answer
A. Conversion factor
Explanation
A conversion factor is a ratio of equivalent numbers with different units that is used to change a measurement from one unit to another. It allows for the conversion of a quantity from one unit to another by multiplying or dividing the original value by the conversion factor. This ensures that the measurement is accurately represented in the desired unit.
2.
The degree of closeness of measurements of a quantity to the actual value is called ___.
Correct Answer
A. Accuracy
Explanation
Accuracy refers to the degree of closeness between the measurements of a quantity and the actual value. It is a measure of how well the measurements reflect the true value, without considering the consistency or reproducibility of the measurements. In other words, accuracy indicates how correct or true the measurements are, regardless of their precision or repeatability.
3.
The rate at which something occurs over a particular period or in a given sample.
Correct Answer
A. Frequency
Explanation
Frequency refers to the rate at which something occurs over a particular period or in a given sample. It is a measure of how often an event or data point is observed. In statistics, frequency is commonly used to analyze and describe the distribution of data. By calculating the frequency of each value or category in a dataset, we can determine which values occur most frequently and identify any patterns or trends.
4.
The value that occurs most frequently in a given data set.
Correct Answer
C. Mode
Explanation
The mode is the value that occurs most frequently in a given data set. It represents the data point that appears with the highest frequency, making it the most common value in the set. This can be useful in analyzing data to understand the most typical or prevalent value within a dataset.
5.
Facts and statistics used for reference or analysis.
Correct Answer
D. Data
Explanation
Data refers to the collection of facts, statistics, or information that is used for reference or analysis. It can include various types of information such as numbers, measurements, observations, or any other relevant data points. In the context of the given options, data is the most appropriate term as it encompasses all the other terms mentioned (frequency, median, mode) and represents the overall information or dataset being referred to.
6.
The value appearing at the center of a sorted version of the list - or the mean of the two central values if the list contains an even number of values.
Correct Answer
B. Median
Explanation
The median is the value that appears at the center of a sorted list or the mean of the two central values if the list contains an even number of values. It is a measure of central tendency that represents the middle value of a dataset. Unlike the mean, the median is not influenced by extreme values, making it a useful measure for skewed distributions. In this context, the correct answer is "Median."
7.
A measuring instrument having two adjustable jaws typically used to measure diameter or thickness.
Correct Answer
A. Caliper
Explanation
A caliper is a measuring instrument with two adjustable jaws that is commonly used to measure diameter or thickness. It allows for precise and accurate measurements by clamping the object between its jaws and then reading the measurement on a scale or digital display. Calipers are commonly used in various fields such as engineering, manufacturing, and woodworking. They are particularly useful when measuring small or delicate objects that cannot be measured accurately with a ruler or other measuring tools.
8.
A function that represents the distribution of variables as a symmetrical bell-shaped graph.
Correct Answer
A. Normal distribution
Explanation
A normal distribution is a function that represents the distribution of variables as a symmetrical bell-shaped graph. It is characterized by a mean and a standard deviation, with the majority of the data falling within a certain range around the mean. This distribution is commonly observed in nature and many statistical analyses assume a normal distribution for the variables being studied. Therefore, the correct answer is normal distribution.
9.
A graph of vertical bars representing the frequency distribution of a set of data.
Correct Answer
D. Histogram
Explanation
A histogram is a graph that displays the frequency distribution of a set of data using vertical bars. Each bar represents a range of values, and the height of the bar indicates the frequency or number of data points falling within that range. Histograms are commonly used to visualize the distribution of numerical data and identify patterns or trends. Unlike scatter plots, which show the relationship between two variables, or bell curves and parabolas, which represent specific mathematical functions, histograms focus on the frequency distribution of data.
10.
System of measurement used in the United States.
Correct Answer
A. US Customary Measurement System
Explanation
The correct answer is the US Customary Measurement System. This system of measurement is used in the United States and is based on traditional units such as inches, feet, pounds, and gallons. It is different from the International System of Units (SI System), which is a modern system of measurement used worldwide and based on metric units such as meters, kilograms, and liters. The US Customary Measurement System is also often referred to as the US customary units or American units.
11.
The digits in a decimal number that carry meaning contributing to the precision or accuracy of the quantity.
Correct Answer
A. Significant Digits
Explanation
Significant digits are the digits in a decimal number that carry meaning contributing to the precision or accuracy of the quantity. They indicate the level of precision of a measurement or calculation. The significant digits are the digits that are not zero and are not placeholders. They are the digits that provide information about the actual value being represented. Counting digits, measured figures, and place holders do not specifically refer to the digits that contribute to the precision or accuracy of a quantity.
12.
A system of measurement and units used internationally consisting of seven base units.
Correct Answer
B. International System of Units
Explanation
The International System of Units (SI) is a globally recognized system of measurement that consists of seven base units: meter, kilogram, second, ampere, kelvin, mole, and candela. It is used internationally for scientific, industrial, and everyday measurements, providing a standardized and consistent framework for measuring physical quantities. The other options listed, such as the US Customary Measurement System and Metric System, are not as widely accepted or used on a global scale. Therefore, the correct answer is the International System of Units.
13.
A group of individual values or bits of information that are related in some way or have some common characteristic or attribute.
Correct Answer
A. Data Set
Explanation
A data set refers to a group of individual values or bits of information that are related in some way or have some common characteristic or attribute. It is a collection of data points or observations that are analyzed or used for statistical purposes. In this context, the other options such as standard deviation, measurements, and conversion factors are not comprehensive enough to encompass the concept of a data set.
14.
The distance of a value in a population (or sample) from the mean value of the population (or sample).
Correct Answer
A. Standard Deviation
Explanation
Standard deviation is a measure of the dispersion or spread of a set of values in a population or sample. It quantifies the average distance of each value from the mean value. A higher standard deviation indicates that the values are more spread out, while a lower standard deviation suggests that the values are closer to the mean. Therefore, the given answer is appropriate as it accurately describes the concept of standard deviation.
15.
To determine the size, amount, or degree of something by comparison with a standard unit.
Correct Answer
A. Measure
Explanation
The given definition describes the process of determining the size, amount, or degree of something by comparing it to a standard unit. This process is commonly known as measuring.
16.
The degree of closeness of measurements of a quantity to the actual (or accepted) value.
Correct Answer
A. Accuracy
Explanation
Accuracy refers to the degree of closeness between measurements and the actual or accepted value. It indicates how well a measurement represents the true value. In other words, accuracy measures the correctness of the measurement. A high level of accuracy means that the measurements are very close to the true value, while a low level of accuracy indicates a significant deviation from the true value.