Kalkulator interval kapercayan
Interval kapercayan kanggo rata-rata saka sampel.
Babagan Kalkulator interval kapercayan
Interval kapercayan kanggo rata-rata saka sampel.
Bagean saka seksi “Statistik” SmartCalcy. Lumaku ing browser panjenengan tanpa akun, nganggo mata uang lan satuan panjenengan dhewe (ganti ing sisih ndhuwur kaca), lan menehi perkiraan mung kanggo informasi, mula priksa pandhuan resmi sadurunge ngandelake asile.
Carane nganggo Kalkulator interval kapercayan
Apa sing dietung lan kapan nganggo
Nemokake interval kapercayan kanggo rata-rata utawa proporsi ing tingkat kapercayan sing dipilih.
Carane nganggo, langkah demi langkah
- Pilih rata-rata utawa proporsi.
- Lebokna angka-angka sampel.
- Pilih tingkat kapercayan.
- Waca margin of error lan intervale.
Tegese saben input
- Rata-rata sampel – Diwiwiti at 52.3.
- Simpangan baku sampel – Diwiwiti at 8.1.
- Ukuran sampel – Diwiwiti at 40.
- Tingkat kapercayan – Diwiwiti at 95%.
Carane maca asile
- Interval kapercayan 95% – The headline answer. In the default example it reads 49.7095 to 54.8905 (52.3 ± 2.59051).
- Galat baku – Default Conto: 1.2807225.
- Nilai t (df 39) – Default Conto: 2.0227.
- Margin Kesalahan – Default Conto: 2.5905057.
- Nganggo z tinimbang t – Default Conto: 49.7898 nganti 54.8102.
Rumus
Mean: x̄ ± z × s ÷ √n (or t for small samples). Proportion: p̂ ± z × √(p̂(1 − p̂) ÷ n). z is 1.96 for 95%.
Conto petungan
With the starting entries (Sample mean: 52.3, Sample standard deviation: 8.1, Sample size: 40, Confidence level: 95%), the calculator shows 95% confidence interval of 49.7095 to 54.8905, 52.3 ± 2.59051. It also reports standard error 1.2807225; t value (df 39) 2.0227; margin of error 2.5905057; using z instead of t 49.7898 to 54.8102.
Asumsi lan watesan
- The sample yaiku random.
- The sample size yaiku large enough kanggo the normal approximation.
Kesalahan umum
- Reading 95% as a 95% chance the true value is inside this one interval.
- Using z kanggo a very small sample.
Pitakonan sing kerep ditakokake
Apa tegese interval 95%?
Yen panliten dibaleni kaping-kaping, kira-kira 95% saka interval kaya ngono bakal ngandhut nilai sing bener.
Piranti sing gegandhengan
Rincian
- Galat baku
- 1.2807225
- Nilai t (df 39)
- 2.0227
- Margin Kesalahan
- 2.5905057
- Nganggo z tinimbang t
- 49.7898 nganti 54.8102