If a roulette wheel is properly balanced, the ball will land on red 18 out of 38 times or with probability 0.474. A gambler studies a roulette wheel to see if it is unbalanced and he can cheat. He observes 150 spins of the wheel and finds that the ball lands on red 73 times. At the significance level, do the data provide sufficient evidence to conclude that the wheel is unbalanced? The null and alternative hypotheses would be:      Ho: ? p = ____________    (please enter a decimal) Ha: p  ≠ _____________  (Please enter a decimal) The test statistic ?  z =           (please show your answer to 3 decimal places.)   The p-value =                (Please show your answer to 4 decimal places.)

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2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.