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A medical researcher says that less than 82​% of adults in a certain country think that...

A medical researcher says that less than 82​% of adults in a certain country think that healthy children should be required to be vaccinated. In a random sample of 600 adults in that​ country, 80​% think that healthy children should be required to be vaccinated. At alphaαequals=0.01​, is there enough evidence to support the researcher's claim? Complete parts​ (a) through​ (e) below.

c) Find the standardized test statistic z.

z= ???

d) Decide whether to reject or fail to reject the null hypothesis and​ (e) interpret the decision in the context of the original claim.

(Fail to reject/ Reject) the null hypothesis. There (is/ is not) enough evidence to support the​ researcher's claim.

Please explain your answers, as I do not understand how to do this! Thank you :)

Math   Statistics-And-Probability   
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