Na'urar lissafin confidence interval
Confidence interval na mean daga samfuri.
Game da Na'urar lissafin confidence interval
Confidence interval na mean daga samfuri.
Ɓangare ne na sashen “Ƙididdiga” na SmartCalcy. Yana aiki a burauzar ku ba tare da asusu ba, yana amfani da kuɗinku da ma'aunanku (canza su a saman shafin), kuma yana ba da ƙiyasi don bayani kawai, don haka duba jagorar hukuma kafin ku dogara da sakamako.
Yadda ake amfani da Na'urar lissafin confidence interval
Abin da yake lissafawa da lokacin amfani da shi
Yana nemo confidence interval na mean ko rabo (proportion) a matakin tabbaci da aka zaɓa.
Yadda ake amfani da shi, mataki-mataki
- Zaɓi mean ko rabo.
- Shigar da lambobin samfuri.
- Zaɓi matakin tabbaci.
- Karanta tazarar kuskure (margin of error) da interval.
Ma'anar kowace shigarwa
- Mean na samfuri – Farawa at 52.3.
- Standard deviation na samfuri – Farawa at 8.1.
- Girman samfuri – Farawa at 40.
- Matakin tabbaci – Farawa at 95%.
Yadda ake karanta sakamako
- Confidence interval na 95% – The headline answer. In the default example it reads 49.7095 to 54.8905 (52.3 ± 2.59051).
- Na yau da kullum Kuskure – Default Misali: 1.2807225.
- ƙimar t (df 39) – Default Misali: 2.0227.
- Gefen kuskure (margin of error) – Default Misali: 2.5905057.
- Ana amfani da z maimakon t – Default Misali: 49.7898 zuwa 54.8102.
Dabarar lissafi
Mean: x̄ ± z × s ÷ √n (or t for small samples). Proportion: p̂ ± z × √(p̂(1 − p̂) ÷ n). z is 1.96 for 95%.
Misali da aka warware
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.
Zato da iyakoki
- The sample shi ne random.
- The sample size shi ne large enough akan the Na al'ada approximation.
Kurakuran da aka saba yi
- Reading 95% as a 95% chance the true value is inside this one interval.
- Using z akan a very small sample.
Tambayoyin da ake yawan yi
Me interval na 95% ke nufi?
Idan kun maimaita binciken sau da yawa, kusan 95% na irin waɗannan intervals za su ƙunshi ainihin ƙimar.
Kayan aiki masu alaƙa
Cikakkun bayanai
- Na yau da kullum Kuskure
- 1.2807225
- ƙimar t (df 39)
- 2.0227
- Gefen kuskure (margin of error)
- 2.5905057
- Ana amfani da z maimakon t
- 49.7898 zuwa 54.8102