Statistics

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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 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 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 biostatistics?

    Q: What is biostatistics?

    A: Biostatistics is a specialized area that applies statistical analysis to fields like biology, agriculture and medicine. Biostatisticians play a large role in scientific research studies, including designing study models and analyzing study results. Medical biostatistics narrows this field further to focus solely on medical and health issues.
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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 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 a criterion variable?

    Q: What is a criterion variable?

    A: According to the University of Connecticut, the criterion variable is the dependent variable, or Y hat, in a regression analysis. The criterion variable is the variable that the analysis predicts. The number given from the analysis fits into the regression line.
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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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  • 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 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 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 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 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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  • What is the definition of "presentation of data"?

    Q: What is the definition of "presentation of data"?

    A: The presentation of data refers to how mathematicians and scientists summarize and present data related to scientific studies and research. In order to present their points, they use various techniques and tools to condense and summarize their findings. These tools include the use of tables, graphs and subsets to provide an overview of their calculations and the data they have mined.
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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 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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  • 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 does "marginal probability" mean?

    Q: What does "marginal probability" mean?

    A: Probabilities may be marginal, joint or conditional. A marginal probability is the probability of a single event happening. It is not conditional on any other event occurring.
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  • Why are statistics important?

    Q: Why are statistics important?

    A: Experts use statistics to understand large and complex sets of data. Statistics are also helpful with surveys, which legislators use to affect policy. Knowing how statistics work is important for fully understanding news reports.
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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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  • 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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  • 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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