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PSYCH 625 r5 Wk1 Descriptive Inferential Statistics Worksheet
Statistics For The Behavior Sciences (PSYCH 625)
University of Phoenix
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- 2. Imagine you are the assistant manager of a fast food store. Part of your job is to report which special is selling best to the store manager at the end of each day. Use your knowledge of descriptive statistics and write one paragraph to let the store manager know what happened today. Use the following data.Special number Sold CostHuge Burger 20 $2.95Baby Burger 18 $1.49Chicken Littles 25 $3.50Porker Burger 19 $2.95Yummy Burger 17 $1.99Coney Dog 20 $1.99Total specials sold 119
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University of Phoenix Material
Descriptive and Inferential Statistics Worksheet
Complete both Part A and Part B below.
Part A
Before completing the following questions, be sure to have read Appendix C and the Statistical Software Resources at the ends of Chapters 2 and 3 from Statistics Plain and Simple.
Highlight the required answers to the question in your Excel output.
- Using Microsoft® Excel®, enter the following data from the 40 participants by first creating a variable
labeled “Score”. Next, compute the mean, median, and mode for the following set of 40 reading
scores:
- PSYCH/625 Version
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- Answer: X Score
Worksheet PSYCH/625 Version 5
23 42 32 34
MEAN 20 31 30 30.
MEDIAN 23 31 24 33
MODE 23 26 24 42
- Imagine you are the assistant manager of a fast-food store. Part of your job is to report which special is selling best to the store manager at the end of each day. Use your knowledge of descriptive statistics and write one paragraph to let the store manager know what happened today. Use the following data.
Special number Sold Cost
Huge Burger 20 $2.
Baby Burger 18 $1.
Chicken Littles 25 $3.
Porker Burger 19 $2.
Yummy Burger 17 $1.
Coney Dog 20 $1.
Total specials sold 119
The Chicken Littles sold the most. There is total value of food that was sold was 303 that is with an average of $2 that for each special. The baby burger made the least amount
According to the sales today, the top three items that sold the most were the Huge Burger, Coney Dog, and Chicken Littles. Based on the numbers, the store made 87 from the 25 chicken littles sold. In combination, the huge burger and coney dogs together made 98. In referencing the chart provided in the Appendix, all the items sold well, but the best-selling item is the chicken littles.
- Suppose you are working with a data set that has some different (much larger or much smaller than the rest of the data) scores. What measure of central tendency (mean, median or mode) would you use and why? According to Salkind (2011), “The median is insensitive to extreme scores, whereas the mean is not. When you have a set of scores in which one or more scores are extreme, the median better represents the centermost value of that set of scores than any other measure of central tendency. Yes, even better than the mean (p).
I would really depend on the was is being analyzed and for that kind of reason that data would be needed because it depends on the type of data that is being used and then at that point is when which of the mean, mode and median would be used.
- During the course of a semester, 10 students in Mr. Smith’s class took three exams. Use Microsoft® Excel® to compute all the descriptive statistics for the following set of three test scores over the course of a semester. Which test had the highest average score? Which test had the smallest amount of variability? How would you interpret the differences between exams, and note the range, means, and standard deviations over time?
Worksheet PSYCH/625 Version 5
Part B
Answer the questions below. Be specific and provide examples when relevant.
Cite any sources consistent with APA guidelines.
Question Answer
What are statistics and how are they used in the behavioral sciences? Your answer should be 100 to 175 words.
Statistics are applied to quantify data based on mathematical analysis. Statistics are used in behavioral sciences where characters in the society can be predicted. Individual responses based on policies that are supposed to be implemented are predicted with the application of statistics in behavioral sciences. Average behaviors are classified based on mathematical analysis by applying the statistical approach. Statistics is a branch of study that provides insights based on quantified models. Research apply statistical analysis, which would influence prediction in behavioral science. Understanding how people will respond to certain policies as well as creating strategies to remedy challenges that might occur in society requires statistical analysis. It is important to note that through a statistical approach, a comparative analysis is conducted to determine average behavioral responses that would influence policy approval as envisaged with the social therapists. Data is applied to determining the behaviors of individuals in society (Gravetter, Wallnau, Forzano & Witnauer, 2020).
Providing examples of each, compare and contrast the four levels of measurement. Your answer should be 175 to 350 words.
Differentiate between descriptive and inferential statistics. What information do they provide?
Descriptive statistics provide descriptions of a certain population that was studied through
Worksheet PSYCH/625 Version 5
What are their similarities and differences? Your answer should be 175 to 350 words.
means of graphs, research articles, or statistics; whereas inferential statistics make predictions and inferences of a certain population that was studied. Both statistics provide information on a population and both are reliable, however, their level of detail and sampling error vary. Descriptive statistics are most used in situations that can be studied in a short amount of time and straightforwardly, and studies that are intended to offer contrasts. For example, questionnaires offer descriptive statistics for a population and can be used to compare to like or unlike research statistics by creating, for example, a graph or chart. The error levels with descriptive statistics are very low since no inference or generalization is being made, it is pure fact. Inferential statistics provide a general or inferred conclusion on a population. For example, a study done on gender roles in society may be done on a small sample of people to represent a whole population or society. There are many more variables that need to be taken into consideration when doing concluding with inferential statistics, such as how the sample population is chosen and the size of the population. The population chosen must be large enough and diverse enough to represent a much larger whole accurately and without much error levels. Of course, with inferential statistics, there is some level of error, but with careful sampling and research, this can be reduced (Frost, 2020). Similarities: Both are methods to conclude conducted research. Both are valid means of concluding research. Both can offer information on a large population. Both are compatible with inductive and deductive research. Differences: The margin of error is much higher with inferential statistics. Descriptive statistics offer straightforward conclusions that can be graphed or noted in amounts.
PSYCH 625 r5 Wk1 Descriptive Inferential Statistics Worksheet
Course: Statistics For The Behavior Sciences (PSYCH 625)
University: University of Phoenix
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