Math Problem Statement
Diketahui ada 600 kepala keluarga sebagai populasi yang membeli pakaian. Hasil penelitian terhadap 33 orang kepala keluarga ternyata jumlah pengeluaran untuk pakaian yang dibeli (ratusan ribuan rupiah) sbb.:
20
15
17
18
22
21
18
14
15
13
16
14
24
25
26
21
18
17
15
19
21
23
21
16
19
18
22
23
24
25
26
20
18
Hitunglah nilai estimasi selang 95% dari data tersebut
Jawab lah dan hitung lah dengan menggunkan rumus overline x -Z a/2 . s sqrt n < mu< overline x +Z a 2 . s sqrt n
Secara lengkap dan berurutan sesuai dengan rumus yg tertera
Solution
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Math Problem Analysis
Mathematical Concepts
Statistics
Confidence Interval
Sample Mean
Standard Deviation
Formulas
Confidence Interval: \(\bar{x} - Z_{\alpha/2} \cdot \frac{s}{\sqrt{n}} < \mu < \bar{x} + Z_{\alpha/2} \cdot \frac{s}{\sqrt{n}}\)
Sample Mean: \(\bar{x} = \frac{\sum x_i}{n}\)
Sample Standard Deviation: \(s = \sqrt{\frac{\sum (x_i - \bar{x})^2}{n-1}}\)
Theorems
Central Limit Theorem
Suitable Grade Level
Grades 11-12
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