Business Insights Through Data case study

A1: Individual Assignment 60% of total grade

Complete all the questions below, be sure to show your calculation/ paste your excel output. You can submit your file in a word or pdf format, and be sure to submit your excel workbook as well.

Q1. In a , many public universities in the United States raised tuition and

fees due to a decrease in state subsidies. The change in the cost of tuition, a shared dormitory

room, and the most popular meal plan from the previous academic year for a sample of 10 public

universities were as follows: $1,589, $593, $1,223, $869, $423, $1,720, $708, $1,425, $922 and

$308. Calculate the following statistics (paste the excel output) A. Mean

B. Median

C. Standard deviation of change in cost

D. Coefficient of Variation of Change in Cost

E. Skewness

Q2. A sample of eight analysts at a software firm were asked to estimate the reuse rate when

developing a new software system. The following data are given as a percentage of the total code

written for a software system that is part of the reuse database.

50, 62.5, 37.5, 75.0, 45.0, 47.5, 15.0, 25.0. Calculate the following statistics (paste the excel


A. Mean percentage of the total code that is part of the reuse database

B. Variance of the total code that is part of the reuse database

C. Standard Deviation of the total code that is part of the reuse database

D. Skewness of the total code that is part of the reuse database

E. Coefficient of Variation of the total code that is part of the reuse database

Q3. .

The AMS technical services department has embarked on a quality improvement effort. Its first

project relates to maintaining target upload speed for its internet service subscribers. Upload

speeds are measured on a standard scale. Data collected over the the upload

speed is . The technical operations department wants to

ensure that the mean target upload speed for all internet subscribers is at least 0.97 on a standard

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