Question 3 of 5 2.0 Poin Last year, about 55% of Americans said that they were c

Question

Question 3 of 5 2.0 Poin Last year, about 55% of Americans said that they were concerned about global warming. Last month, a Gallup poll was conducted to determine whether this proportion had changed. The poll interviewed 928 adult Americans, and found that 64% were concerned about global warming. (Assume these 928 Americans represented a simple random sample.) What are the correct null and alternative hypotheses? O A. Ho: p 0.55 O B. Hop 0.55 HA: p >0.55 O c. Ho p 0.55 HA:p 0.55 O D. Ho p 0.55 HA:p 0.55 Reset Selection o e a o

Explanation / Answer

Here signficance level is not given, so lets assume it as 0.05.

The p-value computed in part 4 is 3.47*10^-8 which is less than the significance level of 0.05.

This means we reject the null hypothesis.

Hence option C is correct

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