BY : SYARIFATUL MUFLIKHAH

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Presentation transcript:

BY : SYARIFATUL MUFLIKHAH STATISTIKA DASAR BY : SYARIFATUL MUFLIKHAH 662016017

Because of staffing decisions, managers of the gibson-marimont hotel are interested in the variability in the number of rooms occupied per day during a particular season of the year. a sample of 20 days of operation shows a sample mean of 290 rooms occupied per day and a sample standard deviation of 30 rooms. a.) what is the point estimate of the population variance? b.) provide a 90% confidence interval estimate of the population variance ? c.) provide a 90% confidence interval estimate of the population standard deviation.

JAWAB :

b.) Estimasi interval kepercayaan untuk variansi populasi adalah:

c.) Estimasi interval kepercayaan untuk standard deviasi populasi adalah :