Estimate an average amount of sick leave per employee

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Reference no: EM1319107

Estimation the mean amount and obtain the bound for the estimate.

A certain firm specializing in the manufacture and sale of free time clothing has 80 retail stores in Florida and 140 in California. With each state as a stratum, the firm wishes to estimate average sick-leave time per employee for the past year. Each outlet can be viewed as a cluster of employees, and total sick leave time for each store can be determined from records. Simple random samples of 8 stores from Florida and 10 from California gave the results shown in the table below (m_i - # of employees, y_i- total days sick leave for the i-th store).

Estimate an average amount of sick leave per employee and obtain the bound for the estimate.

Florida		California
m_i	y_i	m_i	y_i
16	40	16	50
20	51	8	32
8	30	4	11
12	36	5	10
22	68	12	32
15	50	17	37
11	39	22	61
7	23	30	39
		24	40
		10	41

Reference no: EM1319107

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