Compute the standard deviation and recommend the minimum and maximum number of bugs to be used in decisions making

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

The table below shows the number of bugs in software recorded by 120 scientists during a test phase.

474	428	447	483	435	465	498	452	418	483	440	458
474	430	447	407	501	466	498	453	419	485	441	459
475	430	448	407	436	468	500	453	420	486	442	459
476	430	449	408	502	468	502	453	421	488	442	460
477	431	450	410	436	469	502	454	421	489	443	460
478	432	450	412	438	470	505	455	423	490	444	462
479	432	451	413	438	471	508	455	424	493	444	462
481	433	451	413	438	471	509	456	424	494	445	462
482	433	451	415	509	472	511	457	425	495	446	463
482	434	452	416	440	473	515	457	426	497	447	464

Use the data to

a)    Extract a frequency distribution table with the first-class as 401-420.

b)   Compute the mean, mode, and median number of bugs

c)    Compute the standard deviation and recommend the minimum and maximum number of bugs to be used in decisions making.

d)   Assuming that it costs 200/= to rectify each bug identified. Recommend the budget amount that should be set aside to rectify the identified bugs

e)    How would you use the measures above to aid decisions in your day-to-day work at your current workplace? ( indicate your workplace and position or your former workplace and position)

 

 

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