Z-score & rarrabuwar normal
Z-score da yiwuwa a ƙarƙashin lanƙwasan ƙararrawa, da ƙimomi don percentile.
Game da Z-score & rarrabuwar normal
Z-score da yiwuwa a ƙarƙashin lanƙwasan ƙararrawa, da ƙimomi don percentile.
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 Z-score & rarrabuwar normal
Abin da yake lissafawa da lokacin amfani da shi
Yana nemo yiwuwa, z-scores da percentiles na normal distribution da kowane mean da standard deviation.
Yadda ake amfani da shi, mataki-mataki
- Shigar da mean da standard deviation.
- Shigar da ƙima ko yiwuwa.
- Karanta z-score, fili da percentile.
Ma'anar kowace shigarwa
- Lissafa – Farawa at Probability akan a Ƙima.
- Mean – Farawa at 100.
- Na yau da kullum deviation – Farawa at 15.
- Ƙima – Farawa at 120.
Yadda ake karanta sakamako
- Z-score – The headline answer. In the default example it reads 1.3333.
- P(X < ƙima) – Default Misali: 90.879%.
- P(X > ƙima) – Default Misali: 9.121%.
- p-value na gefe biyu – Default Misali: 0.18242.
- Percentile – ta Default example: 90.88.
Dabarar lissafi
z = (x − mean) ÷ standard deviation. The probability is the area under the bell curve up to z, found with the normal CDF.
Misali da aka warware
With the starting entries (Calculate: Probability for a value, Mean: 100, Standard deviation: 15, Value: 120), the calculator shows z-score of 1.3333. It also reports p(x < value) 90.879%; p(x > value) 9.121%; two-tailed p-value 0.18242; percentile 90.88th.
Zato da iyakoki
- The Bayanai follow a Na al'ada distribution.
Kurakuran da aka saba yi
- Applying it zuwa skewed Bayanai.
- Confusing the Yawa (density) with the probability.
Tambayoyin da ake yawan yi
Nawa ne ke cikin standard deviation 1?
Kusan 68%. Kusan 95% yana cikin 2 kuma 99.7% a cikin 3.
Kayan aiki masu alaƙa
Cikakkun bayanai
- P(X < ƙima)
- 90.879%
- P(X > ƙima)
- 9.121%
- p-value na gefe biyu
- 0.18242
- Percentile
- ta 90.88