A professor of women's studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stress-free environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Assume there is a real effect and estimate the size of the effect. _________.
a. 0.8102 c. 0.4322
b. 0.6810 d. 0.5776
Question 2
A professor of women's studies is interested in determining if stress affects the menstrual cycle. Ten women are randomly sampled for an experiment and randomly divided into two groups. One of the groups is subjected to high stress for two months while the other lives in a relatively stress-free environment. The professor measures the menstrual cycle (in days) of each woman during the second month. The following data are obtained. High stress 20 23 18 19 22 Relatively stress free 26 31 25 26 30 Assume you are evaluating H0 using the t test. The df for determining tcrit are _________.
a. 4 c. 8
b. 9 d. 3
Lalla Essaydi, La Grande Odalisque, from the series Les Femmes du Maroc (The Women of Morocco).
When the PCM commands 50% duty cycle, the oil flow through the phaser drops to zero.
The structure of B-DNA from studies of molecular crystals
Blood Alcohol Concentration in men and women
Drosophila life cycle
Survivorship curves. Blue lines are theoretical curves. Red dots are data from field studies.