Examlex
At one hospital, a random sample of 100 women giving birth to their first child is selected. among this sample, the mean age was 26.3 with a standard deviation of 4.9. Estimate the mean age of all women giving birth to their first child at this hospital. Give the 95% confidence interval to two decimal places.
F-test
A statistical test used to compare two variances and determine if they come from populations with equal variances.
Kruskal-Wallis Test
A nonparametric method for testing whether samples originate from the same distribution, used when the assumption of normality in ANOVA is violated.
P-value
The probability of observing test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is true.
Test Statistic
A value calculated from sample data during a hypothesis test to decide whether to reject the null hypothesis.
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