The shape of the normal probability distribution is determined by the population

Question

The shape of the normal probability distribution is determined by the population standard deviation sigma. Large values of sigma reduce the height of the curve and increase spread; Small values of a increase the height of the curve and reduce the spread A. True B. False A continuous random variable at is normally distributed with a mean of 1200 and a standard deviation of 150. Given that x = 1510, its corresponding z-score is 1.40. A). True B) False For a continuous random variable x, the probabilities P(-1 lessthanorequalto x lessthanorequalto 0) and P(0

Explanation / Answer

47. 47. A standard normal distribution is defined as normal distribution with a mean of zero and standard deviation one.When all the values in normal distribution are transformed to Z scores where z= standard normal distribution value, then distribution have a zero mean value and standard deviation 1.
48. Ans -A)
A) A random variable is continuous it probably can take any value on an interval that means there is no breaks between possible values.
B) Binomial is used in discrete random variable which have a different possible values. A continuous random variable has a infinite number of possible value . so we can not use probability for each specific value.

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