For statistical tests of significance about the coefficients, the null hypothesis is that the slope is 1. True False

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The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.