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Tanggal 21 Februari 2016 Tanggal 21 Februari 2016 Tanggal 21 Februari 2016 Oleh Yoka Fernando Oleh Anggun Sri Harmeiia Oleh Angga Listio Jabatan Asisten Tutorial Jabatan Koordinator Tutorial Statin 2 Jabatan Koordinator Asisten

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DEPARTEMEN PENDIDIKAN NASIONAL

UNIVERSITAS ANDALAS FAKULTAS TEKNIK

JURUSAN TEKNIK INDUSTRI LABORATORIUM PERENCANAAN DAN OPTIMASI SISTEM INDUSTRI

TUGAS PENDAHULUAN

STATISTIKA INDUSTRI 2

UJI HIPOTESIS

1. Past experience indicates that the time for high school seniors to complete a

standardized test is a normal random variable with a mean of 35 minutes. If a random

sample of 20 high school seniors took an average of 33.1 minutes to complete this test

with a standard deviation of 4.3 minutes, test the hypothesis at the 0.05 level of

significance that p = 35 minutes against the alternative that p < 35 minutes.

2. Based on 100 reports of deaths that the average age was 61.8 years in Aceh with a

standard deviation of 8.9 years. It is thought that the age of the people of Aceh more

than 60 years. question: a.Make it is in the form of statistical hypothesis b.Benarkah

alleged above, a test with significance level 5%.

3. In the opinion of an official of the social department, average receipts per day kids

newspaper seller in a provincial capital for 7000, with a greater alternative than that.

Known standard deviation of the revenue of 1600. To test his opinion, made of

Inquiry to 256 randomly selected children, apparently in the know on average their

acceptance by 7100. By using alpha = 5%, test that opinion ...!

4. The financial director of a company argues, that the average expenditure for living

expenses per day for the employees of the company in 1760 amounted to an

alternative is not the same with it. To test his opinion, conducted interviews with 25

randomly selected employees in the sample, and it turns out that the average spending

per day is equal to 1700. The standard deviation of 100. By using alpha = 0.05, test

the idea.

5. An owner of a shop selling brand of light bulbs A and B found no difference in the

average length of a light bulb lit up the two brands with an alternative opinion is no

Dibuat Diperiksa Mengetahui

Tanggal 21 Februari 2016 Tanggal 21 Februari 2016 Tanggal 21 Februari 2016 Oleh Yoka Fernando Oleh Anggun Sri Harmeiia Oleh Angga Listio Jabatan Asisten Tutorial Jabatan Koordinator Tutorial Statin 2 Jabatan Koordinator Asisten

TandaTangan

TandaTangan

TandaTangan

DEPARTEMEN PENDIDIKAN NASIONAL

UNIVERSITAS ANDALAS FAKULTAS TEKNIK

JURUSAN TEKNIK INDUSTRI LABORATORIUM PERENCANAAN DAN OPTIMASI SISTEM INDUSTRI

difference. In order to examine his case, then performed the experiment with the light

bulb lit 100 pieces and 50 pieces of brand A brand light bulb B, as a random sample.

It turned out the light bulb can light brand A average for 952 hours, 987 hours while

brand B, each with a standard deviation of 85 hours and 92 hours. By using alpha =

5%, test the idea.

6. A drug commonly sold to reduce nervous tension is believed to be efficacious only

60%. Results of experiments with a new drug is tested on a random sample of 100

adults who suffer from nervous tension showed that 70 felt helpless. Use alfa 0.05!