Answer.....

Given the following sample statistics X(bar) = 20, Y(bar) = 200, Sx - 100, Sy =60, Rxy = 0.4, n = 50, the appropriate regression equation is O A Y= 195.2-0.24X O B. Y = 195.2 +0.24X O C. Y= 159.2+0.24X O D. Y= 195.2 + 0.42XThe average gasoline price of one of the major oil companies in Oman has been OMR 0.95 per gallon. The company is not interested in increasing or decreasing the current prices of gasoline. A random sample of 36 of their gas stations is selected and the average price is determined to be OMR 0,945 per gallon. Furthermore, assume that the population standard deviation is OMR 0.024. Then the 90% critical value for this hypothesis test is O A. $1.645 O B. +1.25 OC +1.6 O D. $1.25