Step-by-step answer:
The normal probability curve is symmetrical about the mean.
This means that for an event that is normally distributed, there is a 50% probability that it falls below the mean, and a 50% probability that it falls above.
From the given information, the mean is 20" and we need the probability that a given infant is longer than 20", namely the mean.
Therefore by the definition of the normal probability curve, there is a 50% probability that the length falls above 20".
This can be verified by referencing a normal probability table with Z=0, meaning at the mean, the probability is equal to 0.5 for Z<0, and therefore 0.5 for Z>0.
Z=(X-mean) / Standard deviation
When Z>0, X (measurement) is greater than the mean
When Z<0, X is less than the mean.
Answer:
Speed = 80 m/s
Step-by-step explanation:
The formula to find the speed of a wave is found by
Speed = Wavelength x Frequency where the frequency is in HZ and the wavelength is in meters
Speed = 200 * .40
Speed = 80 m/s
I could be very much wrong but maybe 45 cm3
Answer:
E. Leela Chitnis
Step-by-step explanation:
