The average score on a nationwide exam is 144. A local group of 25 students take the test and their average score is 163 with a standard deviation of 15. Whta should you conclude? (Use a .05 level of...

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The average score on a nationwide exam is 144. A local group of 25 students take the test and their average score is 163 with a standard deviation of 15. Whta should you conclude? (Use a .05 level of significance)

a. Local students scored significantly better that the national average.

b Local student...

Answered Same DayDec 20, 2021

Answer To: The average score on a nationwide exam is 144. A local group of 25 students take the test and their...

Robert answered on Dec 20 2021

124 Votes

H0 : µ = 144 vs H1 : µ >144
̅ = 163 , σ = 15 , n = 25 , α = 0.05
We can use here,
 t =
√
 6.33
Therefore, The P-Value is < .00001.
The result is significant at p < .05.
Therefore, there is sufficient evidence to say that, Local students
scored significantly better...

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The average score on a nationwide exam is 144. A local group of 25 students take the test and their average score is 163 with a standard deviation of 15. Whta should you conclude? (Use a .05 level of...

Answer To: The average score on a nationwide exam is 144. A local group of 25 students take the test and their...

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