While researching lifestyle changes to improve heart health, you come across a research article reporting that the average american consumes about 2,700 calories per day (μ = 2,700).
you come across another article that refutes this, stating that a sample of americans consumed significantly less than this mean standard on average, t(50) = 2.965, p < 0.05 (η2 = 0.15).
assuming this test was a one-independent sample t-test, answer the following questions.
(a) is this a significant effect? yes, the effect is significant. no, the effect is not significant.
(b) what is the proportion of variance for this effect? (round your answer to two decimal places.)