EBK BUSINESS STATISTICS
7th Edition
ISBN: 9780134462783
Author: STEPHAN
Publisher: PEARSON CUSTOM PUB.(CONSIGNMENT)
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Sociologists argued that women on average earn less than men as women often choose to work less hours. They further suggest that the choice of hours worked may be driven by various factors such as age, childcare needs, occupation choice and flexibility. To investigate the relation between hours worked and income earned by Australian men and women, a researcher plans to survey a sample of individuals across the country.
First, the researcher categorised the data into six location groups and six occupation groups, and calculated the frequencies given below.
Frequency tables
Location
Occupation
Location category
Frequency
Occupation category
Frequency
Location group A
5
Occupation group 1
4
Location group B
7
Occupation group 2
26
Location group C
12
Occupation group 3
15
Location group D
25
Occupation group 4
12
Location group E
10…
In Pakistan, thousands of graduates got degrees from different universities every year. Most of them don't get jobs because of the economic crises. The Jobless rate continued to increase and few of them are involved in illegal activities that cause increasing in the crime rate.
The following data show the jobless rate and the number of crimes for 10 different cities:
City
Jobless Rate (%)
Crime Rate (%)
Karachi
14
3
Lahore
21
4
Islamabad
16
2
Multan
28
4
Faisalabad
13
3
Jacobabad
34
5
Hyderabad
19
4
Peshawar
30
5
Quetta
42
5
Larkana
33
4
Use Microsoft Excel to compute the correlation coefficient. Is there a positive correlation between the jobless rate and the percentage of crime rate? Discuss it?
The national Park service monitors streams in Rainier national park for pollution and fish spawning habits. Suppose it is known that 40% of the streams in the park are either considered "polluted" or "known for spawning stream", 15% of the streams are classified as "polluted" and 35% of the streams are "known for spawning streams" what proportion of streams are known to be both polluted and known for spawning streams.
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