Answer on Statistics and Probability Question for stacey appleton
1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a mean SAT score of 1030 is obtained. The average score for public high school student is 1000 (σ= 200).
b. What are H0 and Ha for this study?
c. Compute Z obt
d. What is the Z critical value (Z cv ) using a 0.05 alpha level?
e. Should H0 be rejected? What should the researcher conclude?
f. Determine the 95 % confidence interval for the population mean, based on the sample mean.
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