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

The obtained value of the appropriate statistic is .

a. tobt = -4.73
b. tobt = -4.71
c. tobt = -3.05
d. tobt = -.047

The df for determining tcrit are .

a. 4
b. 9
c. 8
d. 3

Using a = .052 tail, tcrit = .

a. +- 2.162
b. +- 2.506
c. +- 2.462
d. +- 2.306

Using a = .052 tail, your conclusion is .

a. Accept H0; stress does not affect the menstrual cycle
b. Retain H0; we cannot conclude that stress affects the menstrual cycle
c. Retain H0; Stress affects the menstrual cycle
d. Reject H0; stress affects the menstrual cycle

angle addition postulate

2x=56

step-by-step explanation:

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.

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(sube, sube)