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A counseling agency has the following data on the gender and marital status of 200 clients:​Male​Female​​Single​2030​​Married​100​50If the client was a male, what is the probability that he is single?(Find the approximate value.)

The standard deviation of a standard normal distribution _______________________________________.

The random variable x is the number of occurrences of an event over an interval of 15 minutes. It can be assumed that the probability of an occurrence is the same in any two time periods of an equal length. It is known that the mean number of occurrences in 15 minutes is 7.4. The probability there are 9 occurrences in 15 minutes is:__________________. Refer to the below formular: e=2.7183 formula for chapters 4,5,&6.png

A standard normal distribution is a normal distribution with __________________________.

Assuming that each of the 52 cards in an ordinary deck has a probability of 1/52 of being drawn, what is the probability of drawing a black ace?

Which of the following is NOT true of discrete probability distributions?

Z is a standard normal random variable. The P(1.20 ≤ z ≤ 1.85) equals ______________________. Refer to the standard normal distribution table: standardnormaltable fro0.0to2.09.png

Which of the following graphical displays is helpful when using Bayes’ theorem to calculate a probability?

John Bowlby writes that:

Somatic changes are another word for: