Question

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 :)

Answer #1

A medical researcher says that less than 72% of adults in a
certain country think that healthy children should be required to
be vaccinated. In a random sample of 400 adults in that country,
69% think that healthy children should be required to be
vaccinated. At α=0.05, is there enough evidence to support the
researcher's claim? Select the correct choice below and fill in the
answer box to complete your choice. (Type an integer or a decimal.
Do not round.)...

a
medical researcher says That list than 80% of adults in a certain
country think that healthy children should be required to be
vaccinated in a random sample of 300 and not in that country 77%
think that healthy children should be required to be vaccinated at
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find the standardized test statistic Z

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