(a) Write down the pmf of X, and do not forget to indicate the range of values I can take on. px (x) = (b) What is the probability that the couple will have to have at least five child obtain children of both sexes? Express your answer as a fraction. x =

Find the value of each by hand. Do not use statistical features of your calculator. (a) 8!  (b) 13C10

A test was given to a group of students. The grades and gender are summarized below   If one student is chosen at random from those who took the test, find the probability that the student got a 'a 'C'' GIVEN they are male.   Write your answer as a reduced fraction.P(C ∣ male) =   ?

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Which z-score has the higher frequency? (a) z = +1.0 or z = +2.3; (b) z = −2.8 or z = −1.7; (c) z = −.70 or z = −.20; (d) z = 0.0 or z = −2.0.

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Find the z-score corresponding to the given value and use the z-score to determine whether the value is significantly low or high.  Consider a score to be significantly low if its z-score is less than  or equal to -2.  Consider a z-score to be significantly high if it is greater than or equal to 2.  Round the z-score to the nearest tenth if necessary. A body temperature of 96.7° F given that human body temperatures have a mean of 98.20° F and a standard deviation of 0.62°.