Ask Question
14 February, 09:07

The national mean SAT score in math is 550. Suppose a high school principal claims that the mean SAT score in math at his school is better than the national mean score. A random sample of 72 students finds a mean score of 574. Assume that the population standard deviation is LaTeX: / sigma = 100σ = 100. Is the principal's claim valid? Use a level of significance of LaTeX: / alpha = 0.05α = 0.05.

+5
Answers (1)
  1. 14 February, 10:05
    0
    z = (574-550) / (100/sqrt (72)) = 2.036

    p-value = 0.0209

    Reject the null hypothesis. There is sufficient evidence to suggest that the students' mean SAT score is greater than 550. The principal was right.
Know the Answer?
Not Sure About the Answer?
Find an answer to your question ✅ “The national mean SAT score in math is 550. Suppose a high school principal claims that the mean SAT score in math at his school is better ...” in 📘 Mathematics if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions.
Search for Other Answers