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It is assumed that 50% of children born are female and 50% are male. In a clinic in a remote area of Africa a sample of 500 births recorded 230 boys and 270 girls. Test, at the 5% level, the assumption of equal numbers of boys and girls born into the population.

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What is the correct null hypothesis?

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H0: π = 0.5

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H0: π ≠0.5

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Which one is the correct alternative hypothesis?

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What is the absolute value of the critical value at 5% significance level? 

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What is the value of test statistics in 2 d.p.? 

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What is the decesion?

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