Statistics Essay

Statistics Essay

Length: 1090 words (3.1 double-spaced pages)

Rating: Good Essays

Open Document

Essay Preview

Statistics are necessary for scientific research because they allow the researchers to analyze empirical data needed to interpret the findings and draw conclusions based on the results of the research. According to Portney and Watkins (2009), all studies require a description of subjects and responses that are obtained through measuring central tendency, so all studies use descriptive statistics to present an appropriate use of statistical tests and the validity of data interpretation. Although descriptive statistics do not allow general conclusions and allow only limited interpretations, they are useful for understanding the study sample and establishing an appropriate framework for the further analysis in the study. Further analysis using appropriate statistical methods allows the researchers to establish correlations between independent and dependent variables, define possible outcomes, and identify areas of potential study in the future accurately. Statistics is important for researchers because it allows them to investigate and interpret the data more accurately, and researchers will notice patterns in the data that would be overlooked otherwise and result in inaccurate and possibly subjective conclusions (Portney & Watkins, 2009).
Frequency distribution is a method used in descriptive statistics to arrange the values of one or multiple variables in a sample, so it will summarize the distribution of values in a sample. Frequency distribution is the most basic and frequently used method in statistics because it creates organized tables of data which can be used later to calculate averages or measure variability. The organized data frequency distribution provides continuous data that is easier to work with than raw data obtai...


... middle of paper ...


...loser to the population mean and the plot would display a normal curve because a sampling distribution always forms a normal curve (Portney & Watkins, 2009). When the frequency distribution graph shows a normal curve, it is possible to determine its variability and estimate the standard error of the mean in compliance with the sample data. Unlike probability, an estimate of the population distribution allows researchers to establish the probability of selecting a sample with a predictable mean. Although the sampling distribution for predicting single outcomes is not applicable in reality, sample data can be used to draw inferences about the entire population from one sample, but it is never used to measure variance directly.
However, sample data finds applications in several researches that require estimating unknown population parameters (Portney & Watkins, 2009)

Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Essay about Proceed With Caution: The Danger of Interpreting Statistics

- Statistics should be interpreted with caution as they can be misleading; they can both lie and tell the truth. Whether or not people notice the importance of statistics, statistics are used by different cohorts of people from a farmer to an academician and a politician in their everyday life. For example, Cambodian famers produce an average of three tons or rice per hectare, connection about eighty per cent of Cambodian population is a farmer, and at least two million people support party A?. According to the University of Melbourne, statistics are about making conclusive estimates about the present or to predict the future (The University of Melbourne, 2009)....   [tags: Statistics]

Good Essays
942 words (2.7 pages)

What Are Damned Lies And Statistics Essay

- ... If the sample is not representative of the population being studied, it can easily be found as illegitimate. In Chapter 3, Best shows how even numbers which are legitimate can be misused. Additionally, he illustrates ways in which errors can occur that seem simple, such as generalization, transformation, confusion, and compound errors, which are how chains of bad statistics begin. Chapter 4 warns against comparing apples and oranges in social sciences. Comparisons over time may be inaccurate due to changing measures, unchanging measures, or projections....   [tags: Sociology, Statistics, Social sciences]

Good Essays
1476 words (4.2 pages)

Essay about The Essentials of Studying Statistics

- The Essentials of Studying Statistics Introduction Making effective business decisions are always based on cost, time and prospect. Calculating money cost, time cost and forecast of return, all are based on marketing research, data mining, information analysis and findings. The way of the finding the answer is statistics. Statistics – The Method of Organizing Data Broadly, statistics is a set of disciplines for study quantitative information. Implied that several methods used to collect or process or interpret quantitative data from large amount of information, then finally generate a calculated number, for example average, mean, standard deviation…etc....   [tags: Statistics]

Good Essays
1242 words (3.5 pages)

Essay on Exploring Inferential Statistics And Their Discontents

- ... Parametric tests are precise, whereas non-parametric tests are less precise. One is like looking at something up close while the other I like looking at something from afar. In quantitative research, non-parametric tests are administered only when there is no way to use parametric tests. Parametric tests require normally distributed data. When variables are skewed, methods to adjust the data are available so the data can pass the normality test. Only after all options for using parametric tests are exhausted and have failed to be appropriate should nonparametric tests be used....   [tags: Statistics, Statistical hypothesis testing]

Good Essays
1482 words (4.2 pages)

A Research Study On Statistics Essay

- Statistics are tools used to collect and interpret as a way to assist in answering research questions. According to Leedy and Ormrod (2013), statistics have two functions: to describe quantitative data and then draw inferences from the data. An overwhelming amount of data can be condensed to help in determining patterns and relationships to apply to research questions. This paper will explore statistics by looking at individuals with Type 2 Diabetes in two different groups. One is an intervention group participating in a 12-week lifestyle management program consisting of regular weekly physical activity and weight loss counselling, and the other group did not receive an intervention....   [tags: Statistics, Statistical hypothesis testing]

Good Essays
916 words (2.6 pages)

Essay The Accuracy And Reliability Of Criminal Statistics

- ... But with the estimate of only 20% of all sexual assaults being reported to police, more representative estimation for sexual offences would be approximately 86,000 in a calendar year, almost eight times the amount of vehicle thefts. With this in mind it could be suggested that on the basis of recorded statistics alone, more resources could be being put into the prevention of vehicle theft, when in reality it would seem that sexual assault has a greater need for resources. Therefore the underreporting of crimes could mean that crime is actually occurring more often than is suggested by official police statistics....   [tags: Crime, Criminology, Police, Crime statistics]

Good Essays
1331 words (3.8 pages)

What are Descriptive Statistics? Essay

- ... The software that researchers use is often very expensive and has a steep learning curve. But, you don’t have to be a statistician or mathematical genius to use data. Descriptive statistics do not require one to have the statistical software or the statistical knowledge to describe the basic features of the data, but more often than not, descriptive statistics can be very powerful and persuasive when used appropriately. Defenders can use descriptive statistics to present quantitative descriptions of the data in a manageable form and it helps defenders to simplify large amounts of data numerically and/or graphically....   [tags: data, inferencial statistics]

Good Essays
1943 words (5.6 pages)

Descriptive or Expressive Statistics Essay

- Statistics We define statistics as a branch of mathematics as a means to analyze, understand what we observe and explain synopses, so as to create sense and meaning of our explanations and observations. Each day in life we come across information that originates in various forms. This is to means in order to put sense in this information; there is the necessity to use statistics. Though, due to its empirical applications and focus, statistics is typically regarded as a distinctive math’s sciences and not only a math’s branch (Chance et al, 2005) Therefore, in certain tasks a statistician use is less mathematical; for example, ensuring that collection of data is carried out in a way that yie...   [tags: numerical summaries, inferencial statistics]

Good Essays
997 words (2.8 pages)

Differences Between Descriptive And Inferential Statistics Essay

- Read Part G, Topics 47-61 and Part H, Topics 62-67 in our textbook. Post a reading report on this discussion board forum answering the following questions: 1. What are the differences between descriptive and inferential statistics. Descriptive stats summarize data so the data can be comprehended. The researchers prepare a frequency distribution which shows the frequencies as descriptive statistics. Percentages, and averages are also descriptive statistics. Therefore, the descriptive statistics describe sets of data collected through observation....   [tags: Statistical significance, Statistics]

Good Essays
1130 words (3.2 pages)

Barron's AP Statistics Essay

- I read Barron’s How to Prepare for the AP Statistics Exam. A very educational book helped a lot on the AP test. It clarified ideas that I was uncertain on. It helped me to understand when to use each test and the assumptions needed for each test. Type I and Type II errors were explained in such a way that they became crystal clear to me instead of muddy. Computer and Minitab outputs were thoroughly explained, and I became comfortable with them after reading this book. The Barron’s guide also formatted equations in the same manner as the AP equation sheet, which helped me become familiar with this format before going into the AP test....   [tags: Advanced Placement Statistics]

Free Essays
957 words (2.7 pages)