Statistics

A:

Qualitative data is data that can be observed but cannot be measured. This type of data is often in contrast to quantitative data, which is data that can be measured.

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  • What are the advantages of probability sampling?

    Q: What are the advantages of probability sampling?

    A: Probability sampling offers the advantages of less biased results and a higher representation of the sample in question. It also allows for accurate statistical inferences to be made.
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  • What are some real-world examples of direct variations?

    Q: What are some real-world examples of direct variations?

    A: Direct variation exists when a worker is paid based on the number of hours worked. Another example of a direct variation is a taxi fare that varies according to the distance traveled. Direct variation occurs with two variables when the ratio of their values always remains the same. For example, if the value of A is always twice as much as B, they vary directly.
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  • Why is sampling important?

    Q: Why is sampling important?

    A: Sampling, in statistics, is a method of answering questions that deal with large numbers of individuals by selecting a smaller subset of the population for study. One of the most prevalent types of sampling is random sampling.
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  • How do you measure effectiveness and efficiency?

    Q: How do you measure effectiveness and efficiency?

    A: Effectiveness and efficiency are measured by how rapidly change is expressed in organizational systems and how great the difference is over time. This allows companies to compare workforce performance before and after a change is made. Effectiveness and efficiency look at return on investment, employee engagement, client satisfaction and positive gains versus negative side effects of an endeavor.
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  • What are the disadvantages of simple random sampling?

    Q: What are the disadvantages of simple random sampling?

    A: Although simple random samplings are a common research method, they are expensive to use, extremely time consuming and difficult to organize. A simple random sampling requires a complete list of all members of the target population so that the sample is a real representation of the larger group. Each individual in the population has the same chance of becoming part of the sample. All possible combinations of the sample are equally likely to occur, as well.
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  • What are the divorce rates for second and third marriages?

    Q: What are the divorce rates for second and third marriages?

    A: In the United States, the divorce rate for second marriages is estimated at between 60 and 67 percent. Third marriages fare considerably worse, with the divorce rate estimated between 73 and 74 percent.
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  • Who is the father of statistics?

    Q: Who is the father of statistics?

    A: Sir Ronald Aylmer Fisher, a British statistician, is considered by many to be the father of the modern science of statistics. The Danish statistician Anders Hald recognized him as a genius who built the foundations for modern statistical science, according to Wikipedia.
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  • What does frequency mean in mathematics?

    Q: What does frequency mean in mathematics?

    A: In math, the frequency is the number of times a specific value appears in a data set or list. To find the frequency of these values, one constructs a frequency table and inputs all the different values from the set.
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  • What is the importance of statistics?

    Q: What is the importance of statistics?

    A: Statistics is the study of numerical information, which is called data. People use statistics as tools to understand information. Learning to understand statistics helps a person react intelligently to statistical claims. Statistics are used in the fields of business, math, economics, accounting, banking, government, astronomy, and the natural and social sciences.
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  • How are statistics used in accounting?

    Q: How are statistics used in accounting?

    A: Accountants in various fields, including auditors, forensic accountants, controllers and risk accountants, use statistics to accomplish their professional duties. Accountants who conduct audits use samples that are statistically representative of a data base because it is almost impossible to collect all the data needed in a short period of time. Auditors typically use this method when conducting a reliability assessment to determine the accuracy of the data being audited.
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  • What are the advantages and disadvantages of using statistics?

    Q: What are the advantages and disadvantages of using statistics?

    A: Statistics allow people to analyze surveys, experiments and other data, but they are easy to misrepresent or to use to mislead others. Statistical data is essential to the scientific method. It also helps companies, governments and other entities make decisions.
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  • What are different types of probability?

    Q: What are different types of probability?

    A: Different types of probability include conditional probability, Markov chains probability and standard probability. Standard probability is equal to the number of wanted outcomes divided by the number of possible outcomes.
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  • How many babies are born each year?

    Q: How many babies are born each year?

    A: According to UNICEF article updated in May 2012, about 130 million babies are born each year. CNN notes that an accurate count of the worldwide birth rate is difficult since many countries don't register all new births.
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  • What does "average" mean in mathematics?

    Q: What does "average" mean in mathematics?

    A: In mathematics, the “average” typically refers to the “mean value” of a set of numbers that is found by adding all the numbers in the set and then dividing this answer by how many numbers were in the set. However, there also are other types of averages in mathematics, such as the weighted average, mode and median.
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  • What is the difference between a parameter and a statistic?

    Q: What is the difference between a parameter and a statistic?

    A: A statistic describes a sample, while a parameter describes an entire population. A sample is a smaller subset that is representative of a larger population.
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  • What are the odds of getting hit by a car?

    Q: What are the odds of getting hit by a car?

    A: Based on information provided by the Centers for Disease Control, the odds of being struck by a car in the United States is about one in 4,292. The odds of dying as the result of being struck by a car are about one in 47,273.
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  • What is median vs. mean?

    Q: What is median vs. mean?

    A: The median is the middle number when a set of numbers is arranged in order from smallest to largest, and the mean is the average of a set of numbers. Both these measurements are useful in performing statistical analyses of a number grouping and making projections about future results.
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  • What is qualitative data?

    Q: What is qualitative data?

    A: Qualitative data is data that can be observed but cannot be measured. This type of data is often in contrast to quantitative data, which is data that can be measured.
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  • What is the importance of statistics in economics?

    Q: What is the importance of statistics in economics?

    A: Statistics are a methodology necessary in the field of statistics and are used to collect, analyze and evaluate data. Economics depends heavily on the use of statistics.
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  • What is a coin toss simulation?

    Q: What is a coin toss simulation?

    A: A coin toss simulation uses software to mimic the act of tossing a coin many times to demonstrate how frequency affects probability. With two possible outcomes (heads or tails), most observers assume even odds, or 50 percent, but tossing a coin only a few times may show uneven outcomes. By increasing the frequency of tosses, the result gets close to 50 percent, demonstrating how frequency affects outcomes.
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  • How do you calculate jelly beans in a jar?

    Q: How do you calculate jelly beans in a jar?

    A: To calculate the number of jellybeans in a jar, count the number of jellybeans on the top layer of the jar. Then, count the number of jellybeans going down the side of the jar, and multiply that number by the number of jellybeans in the top layer to get an estimate of the number of jellybeans in the jar.
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