The mean SAT score in the US is 1060. Set a level of alpha for a statistical test at 0.001, 0.01, or 0.05. Discuss your selection. Write the statistical hypotheses. And using the data in the file, determine whether there is a significant difference in the mean SAT score at the high school and the US mean.
t-Test: One-Sample Assuming Unequal Variances | |
SAT Score 2017 | |
Mean | 878.3801 |
Variance | 22041.12 |
Observations | 321 |
Hypothesized Mean Difference | 1060 |
df | 320 |
t Stat | -21.9179 |
P(T<=t) one-tail | 5.67E-66 |
t Critical one-tail | 1.649629 |
P(T<=t) two-tail | 1.13E-65 |
t Critical two-tail | 1.967405 |
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