Esercizi 2

Verifica con Calcolatrice/Software

Se usi una calcolatrice scientifica o un software (es. R, Python, Excel):

• In Excel: =NORM.DIST(1200; 1497; 322; TRUE) → 0.1786 (17.86%)

• In Python:

  pythonCopyDownload

  from scipy.stats import norm
  norm.cdf(1200, loc=1497, scale=322)  # Output: 0.1786

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Z =( 175 - 150 ) / 20 = 1.25

RISPOSTA = 0.105

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TABELLA Z COMPLETA :

61KB

normale z.pdf

PDF

Open

Z = 64 - 70 / 6 = -1

Z = 76 - 70 / 6 = 1

P(−1.00<Z<1.00)=0.8413−0.1587=0.6826

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ESERCIZIO :

Z =( 73 - 70 )/ 6 ⇒ 3/ 6 ⇒ 0.5

P (X < 73 ) = 0.6915