Descriptive Statistics.

Q1.Media reports suggest that shareholders are becoming more willing to put pressure on the performance of corporate managers. Is shareholder activism really increasing or is the media just creating a story? To answer this question, a research organisation questioned 240 shareholders. One question asked was "Have you contacted a corporate director in the last year to express your views on manager performance?" 40% responded yes.

a. Identify the population of interest.

b. Based on the question asked, what is the variable of interest?

c. Identify the sample.

Pick up answers from the statements below:

A.	all disgruntled shareholders
B.	the shareholders who contacted corporate directors
C.	all corporate managers
D.	40% of disgruntled shareholders
E.	240 shareholders
F.	those who expressed their views to a corporate director
G.	shareholder activism
H.	media reports
I.	manager performance
J.	all shareholders

Q2.

A newspaper and magazine publisher in SE Queensland wished to compare its magazine popularity with its competitors. To obtain the sample, the consultant divided the region into 60 subregions then chose 3 of these at random. The selected subregions were further divided into 250 classification units, of which 4 were selected at random. Within each of these, all of the households were sampled. This sampling method is an example of:

A.nonprobability sampling

B.simple random sampling

C.systematic sampling

D.stratified sampling

E.cluster sampling

Q3.Information about wages and wage earners was recorded for last year. Which of the following variables are qualitative?

A.annual wage in dollars

B.industry involved - manufacturing, construction or other

C.years of education

D.years of work experience

E.Australian citizen or not

F.age in years

G.married or not

Q4.use Excel Data Analysis to compute the descriptive statistics forBLaw(column E). Calculate (i) mean - standard deviation (correct to 1 decimal place) (ii) mean + standard deviation (correct to 1 decimal place) (iii)Using the empirical rule how many data points are expected to be within one standard deviation to either side of the mean (nearest whole number)? (iv) In the data file, count how many actual sample data points for BLaw are within the range of one standard deviation to either side of the mean (nearest whole number)?

BA	BSC	BCOM	BENG	BLAW
34865	37609	50658	44915	59605
33536	47583	45743	39319	47397
37850	45627	38288	40976	49352
39500	47831	40226	34684	44379
39020	47022	41093	37761	54681
32617	36915	51659	45548	49205
30112	34065	48677	34515	51350
36693	48464	49924	46415	49236
32634	48958	47397	41941	59618
38665	31901	49352	44468	53788
31963	35389	44379	34992	40998
27014	49850	54681	34740	59618
39459	42449	42510	47186	51818
39699	37518	43856	40037	59986
41878	39660	49236	41766	46495
30233	44864	43382	40013	56537
35465	36850	53788	38225	46801
34373	41648	40998	39049	64350
33008	38375	39623	46775	53361
37038	50245	40708	48987	55426
37379	43441	59986	41075	54230
39125	43144	46495	44812	41527
37704	36134	56537	46340	44569
41011	41005	46801	34529	45185
31090	44469	35945	40850	44357
39160	40894	53361	34403	50700
38201	46800	55426	38623	40676
39746	35659	54230	30632	44828
33024	43118	41527	38617	39355
36981	39182	44569	39915	51646
39234	43390	45185	36741	43313
34606	45301	44357	36202	48178
38193	44699	37705	38306	54321
37196	39430	40676	32594	46540
33504	41909	44828	45367	53745
27938	45630	39355	37987	44118
34720	50050	51646	33435	37090
38520	43676	43313	38136	45305
40785	49968	48178	41941	43226
37101	40320	54321	46331	45175
35494	31727	37024	38422	50072
38914	48445	53745	30848	56202
31597	47356	44118	35850	55250
41968	38813	37090	37445	39949
36095	30486	45305	42154	48675
38809	46063	43226	35027	59297
31408	39850	45175	35136	56943
33056	39650	50072	38126	52477
37218	29500	56202	36756	40023
37168	29500	33617	46067	63050