In 2001 polls indicated that 74% of Americans favored mandatory testing of students in public schools as a way to rate the school. This year

Question

In 2001 polls indicated that 74% of Americans favored mandatory testing of students in public schools as a way to rate the school. This year in a poll of 1,000 Americans 71% favor mandatory testing for this purpose. Has public opinion changed since 2001? We test the hypothesis that the percentage supporting mandatory testing is less than 74% this year. The P-value is 0.015. Which of the following interpretation of this P-value is valid? Group of answer choices There is a 1.5% chance that the null hypothesis is true. The probability that Americans have changed their opinion on this issue since 2001 is 0.015. If 74% of Americans still favor mandatory testing this year, then there is a 1.5% chance that poll results will show 71% or fewer with this opinion.

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3 weeks 2022-01-03T13:20:11+00:00 1 Answer 0 views 0

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  1. Ava
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    2022-01-03T13:21:16+00:00

    Answer:

    The right answer is:

    “If 74% of Americans still favor mandatory testing this year, then there is a 1.5% chance that poll results will show 71% or fewer with this opinion.”

    Step-by-step explanation:

    The P-value represents the probability of getting the sample we got, given that the null hypothesis is true. For this reason, it the P-value is lower than the significance level, it means that the sample result is unlikely due to chance, but due to a false null hypothesis.

    In this case, the P-value represents a probability P=0.015 of having a sample with proportion p=0.71, given that the population has a proportion π=0.74.

    The right answer is:

    “If 74% of Americans still favor mandatory testing this year, then there is a 1.5% chance that poll results will show 71% or fewer with this opinion.”

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45:7+7-4:2-5:5*4+35:2 =? ( )