One-hundred test scores were recently obtained from a local high school to compare to the national...
One-hundred test scores were recently obtained from a local high school to compare to the national average. The mean verbal SAT score for this sample was 440. Compare this sample to the population of SAT verbal test scores (SAT Verbal Test μ = 430 and σ = 120).
State the alternative hypothesis Ha
Homework Answers
Answer)
Null hypothesis Ho : u = 430
Alternate hypothesis Ha : u not equal to 430
Test statistics z = (sample mean - claimed mean)/(s.d/√n)
Z = (440-430)/(120/√100) = 0.83
As the population s.d is known here we will use z distribution table to estimate the p-value
From z table, P(z>0.83) = 0.2033
As the test is two tailed, P-value = 2*0.2033 = 0.4066
As the obtained P-value is extremely large we fail to reject the null hypothesis
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One-hundred test scores were recently obtained from a local high
school to compare to the national...
One-hundred test scores were recently obtained from a local high school to compare to the national...
One-hundred test scores were recently obtained from a local high school to compare to the national average. The mean verbal SAT score for this sample was 440. Compare this sample to the population of SAT verbal test scores (SAT Verbal Test μ = 430 and σ = 120). Calculate the standard error of the mean.
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