Mathematics, 22.04.2021 18:20 allanarayos5597
In 2017, the average reading score of the fourth graders in the United States was 222 points. In a simple random sample of 16,000 fourth graders taken nationally in 2019, the average reading score is 221 and the SD is 40 points. Is the national average reading score for fourth graders in 2019 different from what it was in 2017? Or is the observed difference just chance variation? Perform a test of hypotheses to answer the question, in the following steps.
a) State an appropriate null hypothesis in non-technical terms and also as a set of assumptions about random variables.
b) State an appropriate alternative hypothesis.
c) What test statistic are you going to use? Justify your choice
d) Find an exact or approximate p-value.
e) At the 5% level, what is the conclusion of the test? Why?
Answers: 3
Mathematics, 21.06.2019 14:00, angellv917
At the many chips cookie company they are serious about the number of chocolate chips in their cookies they claim that each cookie hasn't c chips. if their claim is true there will be 200 chips in 10 cookies
Answers: 2
Mathematics, 22.06.2019 00:00, hdwoody2002
Percy rides his bike 11.2 miles in 1.4 hours at a constant rate. write an equation to represent the proportional relationship between the number of hours percy rides, x, and the distance in miles, y, that he travels.
Answers: 1
In 2017, the average reading score of the fourth graders in the United States was 222 points. In a s...
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