1. Consider a new computer software package developed to help systems analysts reduce the

time required to design, develop, and implement an information system. To evaluate the

benefits of the new software package, a random sample of 24 systems analysts is selected.

Each analyst is given specifications for a hypothetical information system. Then 12 of the

analysts are instructed to produce the information system by using current technology. The

other 12 analysts are trained in the use of the new software package and then instructed to

use it to produce the information system. The researcher in charge of the new software

evaluation project hopes to show that the new software package will provide a shorter mean

project completion time.

A. What is the objective of this study?

B. What are dependent and independent variables of this study? Identify their scale of

measurement.

C. What is null and alternative hypothesis of this study?

D. Test the hypothesis at 0.05 level of significance.

Completion time data and summary statistics for the software testing study

Current Technology New Software

300 274

280 220

344 308

385 336

372 198

360 300

288 315

321 258

376 318

290 310

301 332

283 263

2. A study was conducted within a western Australian secondary school to test

the effectiveness of using ICT on students' critical thinking skills. Tests were

administered both before and after the first semester among randomly

selected students. (Level of significance 0.01).

A. What are the variables used in this analysis? state their scales of

measurement.

B. What is the sample size?

C. Write the appropriate objective, research question; null and alternative

hypotheses.

Key the data into the Excel and run an appropriate statistical technique

D. What is the value of the test statistic? Justify your answer

E. What would be your decision and justify your answer?

F. What can you conclude based on the analysis?

G. Write a short report.