# Descriptive Statistics & Charts Data Set

Problem Set 1:

Please view the attachment as well. The data set contains the following variables:

Sales: Total sales (in $) by each salesperson last year

Department: What department (home electronics, computers, etc) the salesperson works in.

Year born: The year in which the salesperson was born

Training Hours: Number of hours of training the individual has received during career.

Gender: Salesperson's Gender

Experience: Number of years the individual has worked with your company.

Education: Level of education completed by salesperson

Marital Status: Salesperson's Marital Status

Use the data provided to answer the following questions.

Problem 1.1: Use the data to determine the following:

(a) Which of the variables are categorical and which are numerical?

(b) Which of the categorical variables are nominal and which are ordinal?

(c) Which of the numerical variables are ratio and which are interval?

Problem 1.2: Use the salesperson data to do the following:

(a) Create a summary table and an ordered summary table of the departments the salespeople work in.

(b) Construct a bar chart, a pie chart, and a Pareto diagram.

(c) Which graphical method do you think is best to portray these data?

(d) Based on this data, what conclusions can you make about the departments your salespeople work in?

Excel tips:

The easiest way to create the frequency summary table is with the COUNTIF command. The command works like this: =COUNTIF(x,y), where x is the set of cells you want to look in for a particular value, and y is the value you are looking for. For example, =COUNTIF(E:E, "Female") would look in the E column for all instances of the term "Female", count them up, and give you the number.

Excel doesn't have a "canned" option to create a Pareto Diagram, so this is what you need to do: First, construct a column chart with data for both percentage and cumulative percentage. Then, click on one of the columns that represents data from one of the cumulative percentages, choose "change series chart type," and set it to line.

Problem 1.3: Use the data to do the following:

(a) Construct a frequency distribution and a percentage distribution of the years of experience of your sales force.

(b) Construct a histogram and a percentage polygon.

(c) Plot a cumulative percentage polygon.

Excel tips:

As a general rule of thumb, the fewer times you type out a formula, the better. If you can accomplish a task by writing one formula and then filling it down with the fill bar, do it that way so you can minimize your chances of making mistakes. One feature that is very useful for accomplishing this task is making use of relative and absolute cell references. Say, for example, in cell C1 you have the expression =A1+B1. If you fill C1 down to C2, C2 will have the equation =A2+B2...when filling down, Excel viewed your cell references as relative, as if you said in C1 to make C1 equal to the sum of the two cells to the left of it. When you fill down to C2, Excel said that C2 should equal the sum of the two cells to the left of it, in this case A2 and B2. In some cases this is exactly what you want Excel to do, but in others you do not want relative cell references. For example, cell D1 may have total nationwide sales for your company, A1:A51 may have the names of the 50 states (plus DC!), and B1:B51 may have total sales within each state. In column C you want to have the percentage of total sales within that state. If in C1 you type =B1/D1, you will get the correct result, but then if you fill D1 down to D51, you will get error messages (or wrong answers) everywhere else. The easiest fix is to use an absolute reference in your equation, which you accomplish with the dollar sign ($). The $ is essentially a way of "locking" in either a row or column in a cell reference. If you type in C1 =B1/D$1, and then fill down, Excel will "lock in" the first row in the reference, so all of your formulae will compute correctly! With knowledge and appropriate application of relative and absolute references, it is possible to create the table in part (a) by typing exactly 4 equations (and filling them down) and nothing else!

Problem 1.4: Use the salesperson data to do the following:

(a) Compute the mean, median, first quartile, and third quartile for the sales variable.

(b) Compute the variance, standard deviation, range, interquartile range, coefficient of variation, skewness, and Z scores for the sales variable.

(c) Are the data skewed? If so, how?

(d) Based on the results of (a) through (c), what conclusions can you reach concerning sales?

(e) Calculate the proportion of sales that are +/- 1, +/- 2, and +/- 3 standard deviations of the mean.

(f) Compare and contrast your findings with what would be expected on the basis of the empirical rule.

Excel Tips:

Excel has built-in functions to calculate the mean (AVERAGE), median (MEDIAN), quartiles (QUARTILE), variance (VAR for samples, VARP for populations), and standard deviation (STDEV for samples, STDEVP for populations). You might also think to use the MIN and MAX commands in calculating range. Search the Excel helpfile for the appropriate syntax of these commands.

Problem 1.5: Use the sales data to do the following:

(a) Compute the co-variance between sales and hours of training.

(b) Compute the coefficient of correlation between sales and hours of training.

(c) Construct a scatterplot between sales and hours of training with sales on the Y-Axis.

(d) Which of (a)-(c) do you think is the most valuable means to understand the relationship between sales and hours of training?

(e) What conclusions can you reach about the relationship between sales and hours of training? What sorts of business implications does this have?

Excel Tips:

Excel has built-in functions to calculate the co-variance (COVAR) and correlation coefficient (CORREL). Search the Excel helpfile for the appropriate syntax of these commands.

https://brainmass.com/statistics/descriptive-statistics/descriptive-statistics-charts-data-set-427309

#### Solution Summary

The solution provides a step by step method for the calculation of descriptive statistics and a preparation of a summary table, an ordered summary table, a bar chart, a pie chart, a Pareto diagram, a frequency distribution, a percentage distribution, a histogram, a percentage polygon, and a cumulative percentage polygon. Formulas for the calculations and Interpretations of the results are also included.

Statistics

Note: If this assignment is in the library I cannot use it because a new set of data is used each session.

*******I have no clue how to do this. So PLEASE show me how !

you have been selected to participate in this massive global undertaking for American Intellectual Union

The study will require that you examine data, analyze the results, and share the results with groups of other researchers. Job satisfaction is important to companies large and small, and understanding it provides managers with insights into human behavior that can be used to strengthen the company's bottom line.

The data set for the study is a sample of a survey conducted on the population of the American Intellectual Union (AIU). It is available via the following link: it is attached." Excel 2007 DataSet with DataSet Key which contains the following nine sections of data that will be used throughout our course: "

Work:

â?¢You will need to examine two of the nine sections of data:

â-¦one section of qualitative data (choose either Gender or Position)

â-¦one section of quantitative data (choose either Intrinsic or Extrinsic)

â?¢Each section should include all data points listed in the column for the variable.

I have choosed the following two.

â-¦Gender

â-¦Intrinsic Job Satisfactionâ?"Satisfaction with the actual performance of the job.

The requirements include:

1.Identify the data you selected.

2.Explain why the data was selected.

3.Explain what was learned by examining these sets of data.

4.Your analysis should include using Microsoft Excel to obtain information about the data through the use of three measures of central tendency (mean, median, mode).

5.Your analysis should also include the use of two measures of variability (standard deviation and variance). Some measures are appropriate for qualitative data, and some are appropriate for quantitative data.

6.If a measure is not applicable, then explain why.

7.You will have to also provide one chart/graph for each of the results of the two processed sections of data (2 total), such as a pie or bar chart or a histogram. (A table is not a chart/graph.) Ensure that you label the chart/graph clearly.

8.You will then need to discuss what you additionally learned from the results of this process.

9.Explain why charts/graphs are important in conveying information in a visual format and why standard deviation and variation are important

**** Also I don't know how to use excel to get data. Please HELP!!!!!!!

***the instruction that was just added are as followed:

You will need to combine all of the items above into one comprehensive report. This report must be completed in Microsoft Word and should contain:

Load the Data Analysis Toolpak

********The instructor has a template to use it is attached. Basically itâ??s questions .

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