Question

TheThe frequency distribution of the number of years of service for 100 employees is shown below....

TheThe frequency distribution of the number of years of service for 100 employees is shown below.

Years

Frequency

0 up to 5

12

5 up to 10

16

10 up to 15

42

15 up to 20

20

20 up to 25

10

Total

100

i. Construct a relative frequency distribution for this data

ii.Estimate the proportion of employees who have fewer than 10 years of service

iii. Estimate the proportion of employees who have more than 20 years of service

iv. Estimate the proportion of employees who have between 10 and 20 years of service

v. According to the records, 30% of the businesses in US does sponsor in large scale. Just this morning 10 businesses sponsored.

  1. What is the expected number of businesses that sponsor?
  1. What is the standard deviation of the number of businesses that sponsor?
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