The issue/scenario: A bio-tech firm has provided you with 1 years’ worth of sales for a sample of 45 sales staff. Some of its sales staff are engineers and others are not. You are to analyze this data to help the company determine whether there are any differences in the sales between engineers and non-engineers. Arguably, perhaps engineers are better able to answer technical questions, but may not have the same skills as others. Additionally, the company would like to use this data to obtain an estimate of its average (annual) sales and how they compare to last year.To aid you, the following “guiding steps”:Use a bivariate tabular method to study the relationship between “Sales” and “Engineer.” Based on this analysis, are engineers better or worse than non-engineers at Sales (higher sales are considered better)? Provide a statistical description of the variable “Sales” (for engineers and non-engineers combined). Use this to determine whether there is a lot of volatility in sales, whether there are any outliers, whether the data is skewed, etc. Now, provide a statistical description of the difference in sales between engineers and non-engineers. What are the key similarities and differences that you observe between these two groups (provide at least one similarity, and one difference)? Provide a graphical summary of your answer in (c.) Provide a point estimate of the average sales by all employees (i.e., by both engineers and non-engineers). Provide an improved estimate average sale, i.e., one that is more accurate that your answer in (d.): Last year sales averaged 105.6 units. Use your answers to (f) to whether this year’s sales (provided in your data) are different from last year’s sales. 8. Provide an improved estimate of sales of engineers and non-engineers (separately). SalesEngineer113No98No76No101No120No131No66No98No83No75No87No96Yes90Yes117Yes118Yes95Yes94Yes119Yes115Yes99Yes102Yes129Yes100Yes111Yes128Yes104Yes133Yes125Yes99Yes90Yes122Yes62Yes100Yes123Yes120Yes71Yes102Yes89Yes106Yes80Yes99Yes104Yes105Yes105Yes90Yes

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Answered: he issue/scenario: A bio-tech firm has…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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The issue/scenario: A bio-tech firm has provided you with 1 years’ worth of sales for a sample of 45 sales staff. Some of its sales staff are engineers and others are not. You are to analyze this data to help the company determine whether there are any differences in the sales between engineers and non-engineers. Arguably, perhaps engineers are better able to answer technical questions, but may not have the same skills as others. Additionally, the company would like to use this data to obtain an estimate of its average (annual) sales and how they compare to last year.

To aid you, the following “guiding steps”:

Use a bivariate tabular method to study the relationship between “Sales” and “Engineer.” Based on this analysis, are engineers better or worse than non-engineers at Sales (higher sales are considered better)?
Provide a statistical description of the variable “Sales” (for engineers and non-engineers combined). Use this to determine whether there is a lot of volatility in sales, whether there are any outliers, whether the data is skewed, etc.
Now, provide a statistical description of the difference in sales between engineers and non-engineers. What are the key similarities and differences that you observe between these two groups (provide at least one similarity, and one difference)?
Provide a graphical summary of your answer in (c.)
Provide a point estimate of the average sales by all employees (i.e., by both engineers and non-engineers).
Provide an improved estimate average sale, i.e., one that is more accurate that your answer in (d.):
Last year sales averaged 105.6 units. Use your answers to (f) to whether this year’s sales (provided in your data) are different from last year’s sales.

8. Provide an improved estimate of sales of engineers and non-engineers (separately).

Sales	Engineer
113	No
98	No
76	No
101	No
120	No
131	No
66	No
98	No
83	No
75	No
87	No
96	Yes
90	Yes
117	Yes
118	Yes
95	Yes
94	Yes
119	Yes
115	Yes
99	Yes
102	Yes
129	Yes
100	Yes
111	Yes
128	Yes
104	Yes
133	Yes
125	Yes
99	Yes
90	Yes
122	Yes
62	Yes
100	Yes
123	Yes
120	Yes
71	Yes
102	Yes
89	Yes
106	Yes
80	Yes
99	Yes
104	Yes
105	Yes
105	Yes
90	Yes