Future Computer Company has developed a new computer accounting
software package to help accountancy analysis reduce the time required to
design, develop and implement an accounting system. To evaluate the benefits
of the new software package, a random sample of 24 accountancy analysis is
selected. Each analyst is given specifications for a hypothetical accounting
system. Then 12 of the analysis are instructed to produce the accounting
system by using the 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 accounting system. The 24 analysts complete the study and the results are
shown below:
Completion Time Data and Summary Statistics for the Software Testing Study.
Current
technology
New
technology
300 276
280 222
344 310
385 338
372 200
360 302
288 317
321 260
376 320
290 312
301 334
283 265
Sample size n1 = 12 n2 = 12
Sample mean
X1
= 325
X2
= 288

Sample standard deviation S1
= 40 S2 = 44
Required:
Determine whether the new software package should be adopted at 95%
confidence level.