Statistics

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 the importance of statistics in people's daily lives?

    Q: What is the importance of statistics in people's daily lives?

    A: People use statistics daily for weather forecasts, predicting disease, preparing for emergencies, medical research, political campaigns, tracking sales, genetics, insurance, the stock market and quality testing. Statistics lends credibility to these industries and makes it easier to track different things in the industry.
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  • What are some examples of continuous variables?

    Q: What are some examples of continuous variables?

    A: Some examples of continuous variables are measuring people's weight within a certain range, measuring the amount of gas put into a gas tank or measuring the height of people. A continuous variable is any variable that can be any value in a certain range.
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  • What is the role of statistics in research?

    Q: What is the role of statistics in research?

    A: Statistics play an important role in research of almost any kind because they deal with easily-quantified data. When working in fields such as science or medicine, trials are needed, and experimental data has to be collected and analyzed. The study of statistics enables researchers to look at a large set of data and condense it into meaningful information.
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  • What percentage of our lives are spent working?

    Q: What percentage of our lives are spent working?

    A: About one-third or 30 percent of human life is spent working. The average working week in the United States consists of 40 hours of work. Most people take a few holidays every year. On an average, most people spend about 25 to 30 years working.
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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 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 big is a cereal box?

    Q: How big is a cereal box?

    A: Cereal box size depends on the cereal brand and the volume size. For example, a box that is 12 inches long, 7 5/8 inches wide and 2 1/2 inches deep is required to hold 12.8 ounces of Multi Grain Cheerios.
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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 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 the importance of statistics in business?

    Q: What is the importance of statistics in business?

    A: Statistics are an important tool for running a business. Managers are required to make decisions based on data collected over time. This data is worthless unless it is analyzed and interpreted; statistics allows business managers to analyze the data and arrive at meaningful conclusions.
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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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  • How many cubic feet are in a 53-foot trailer?

    Q: How many cubic feet are in a 53-foot trailer?

    A: A typical 53-foot trailer that is 9 feet high and 8 feet wide contains 3,816 cubic feet of space. However, because of the irregular shape of many items being shipped, a trailer is often not filled completely. Air pockets are located in various locations throughout the trailer.
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  • What is the difference between the dependent variable, the independent variable and the controlled variable?

    Q: What is the difference between the dependent variable, the independent variable and the controlled variable?

    A: The difference between the independent, dependent and control variables rests with the way each variable impacts research. The dependent variable is the item under observation, the independent variable receives manipulation by a researcher and the control variable is an aspect that affects the dependent variable if the researcher does not hold it constant, explains Nuffield Foundation. These variables form the basis of an experiment or observation.
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  • How do you work out probability?

    Q: How do you work out probability?

    A: Theoretically, define the probability of a specific outcome of any event as the ratio of the number of outcomes that favor that specific outcome to the total number of possible outcomes of that event. Mathematically, define the probability of outcome "A" with this equation: P(A) = Number of outcomes that favor A / Number of every possible outcome.
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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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  • 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 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 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 is a good statistical sample size?

    Q: What is a good statistical sample size?

    A: A good statistical sample size is at least 100, and preferably more, participants. With a 100-participant sample size, the researcher has a margin of error of approximately 10 percent with a 95 percent confidence rating in the results. For the researcher to increase his confidence rating and reduce his margin of error he has to increase the size of the sample.
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  • How do you average your grades?

    Q: How do you average your grades?

    A: To calculate an average grade, first add up all the individual grades, then divide by the total number of grades. Letter grades or percentage grades can be converted to the 4.0 scale to find the grade point average, or GPA.
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