Consider an experiment in which Shireen measures 20 Arabidopsis plants in a pasture that an agricultural company claims have an average height of exactly 23 cm. Her plants have a mean of 24.53 cm with a standard deviation of 2.33 cm, however. Based on her t-test statistic, which of the following best describes her conclusion?

Question

Quizplus · Accepted Answer

The correct conclusion is that she rejects the null hypothesis, which posits no difference between the sample mean and the population mean (23 cm), and concludes that the mean height of the plants seems to differ from 23 cm. This is because the observed mean (24.53 cm) is significantly different from the claimed mean, as indicated by the t-test statistic.

Consider an Experiment in Which Shireen Measures 20 Arabidopsis Plants