Answer Happy

Please answer all parts
1. The table below reports the ages (in years) and the number of hours of sleep in one night by seven adults. Age, Hours of sleep, y 35 7 20 9 59 5 42 6 68 5 38 8 75 4 n=7, Στ=337, Στ = 18563, Σy = 44, Σy = 296, Σry = 1916. (a). (2 pts.) Calculate the sample correlation coefficient r between age, x, and the number of hours slept in one night, y. (b). (5 pts.) Test for significant linear correlation between age of an adult and the number of hours slept in one night by an adult at a = .05 (c). (5 pts.) Find the equation of the best fit line relating the number of hours slept by an adult, y to the adult's age, z. 10? Why (d) (2 pts.) Can you use the equation in part (c) to predict y when x = or why not?