After learning from an analysis that the correlation between the amount of grey hair a person is highly (positively) correlated with the amount of money (including all investments and assets etc.) one has, Joe quickly dyed his hair to white (with some grey shades) because he wanted to be rich. 1. Discuss if his comment is valid, in regards to the use of correlation coefficient in statistics.

Find the quotient. 50a2 – 98b2 -5a +7b

Evaluate the expression for the given value of the variable. | ? 4 b ? 8 | + ? ? ? 1 ? b 2 ? ? + 2 b 3 -4b-8+-1-b2+2b3 ; b = ? 2 b=-2

Astandard deck of cards contains 52 cards. one card is selected from the deck. (a) compute the probability of randomly selecting a diamond or heart. (type an integer or a decimal rounded to three decimal places as needed.) (b) compute the probability of randomly selecting a diamond or heart or club. (type an integer or a decimal rounded to three decimal places as needed.) (c) compute the probability of randomly selecting queen or club. (type an integer or a decimal rounded to three decimal places as needed.)