Examlex
A sewing machine needle moves up and down in simple harmonic motion with an amplitude of 1.27 cm and a frequency of 2.55 Hz. What is the maximum acceleration of the needle?
T-test
A type of inferential statistic used to determine if there is a significant difference between the means of two variables, often used when the data sets would follow a normal distribution and have a known standard deviation.
Dependent Means
Pertains to a statistical analysis involving paired or matched samples, comparing the means between two related groups.
Directional Hypothesis
A hypothesis that predicts not only a relationship but also the direction of the relationship between two variables or groups.
Alpha
A threshold value used in statistics to determine the significance level below which a null hypothesis is rejected in a hypothesis test.
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