Young et. al. (2006) took measurements of subordinate female meerkats to determine the changes in reproductive physiology experienced by females that are evicted from thier social group. They compared evicted females and those not evicted in thier level of plasma luteinizing hormone following a GnRH hormone challenge. They found that nine evicted females had a sample average of 6.2 mlU/ml (milli-International Units per milliliter) of plasma luteinizing hormone compared with 12.1 mlU/ml in 18 females that had not been evicted. The pooled sample varience was 28.4 a. Is this an experiemtnal study or an observational study? Explain. b. the sample size was unequal between teh two groups of females compared. How woudl this affect the power of a hypothesis test of the difference between group means compared with a more balanced design? Explain. c. How would the imbalnce of the sample sizes affect the width of the confidence interval for the difference between group means compared with a more balanced design? Explain. d. If you were planning to repeat the comparison of plasma luteinzing hormone between these two groups of females, what sample size would you plan to achieve an expercted half width of 3mlU/ml of a 95% confidence interval of the difference between means?

people went from manufacturing one object at a time by hand to manufacturing many objects in factories

mr. flanders’ class sold 47 doughnuts and   mr. rodriquez’s class sold 38 cartons of milk

step-by-step explanation:

let x be the number of doughnuts sold by mr. flanders’ class and y be the number of cartons sold by mr. rodriquez’s class.

1. together, the classes sold 85 items, then

x+y=85.

2. both classes earn earned $104.49 for their school. if doughnuts were sold for $1.35 each, then x doughnuts costed $1.35x. if cartons of milk were sold for $1.08 each, then y cartons costed $1.08y. hence,

1.35x+1.08y=104.49.

3. solve the system of two equations:

pentagon

step-by-step explanation:

the coordinates   a(5, -2), b(3,-1),c(-4,-4) d(-3,8) and e(-1,4) forms the vertices of the polygon when they are connected in order.

in order to classify that which polygon is it with the given coordinates, first count the number of vertices and then count the number of sides it can make with these vertices.

since, the given coordinates have five vertices, therefore, it will make five sides. moreover, pentagon is regular in nature therefore it will be convex.

now, a polygon with five sides is known as pentagon, therefore, the given polygon is the pentagon.

step-by-step explanation:

infinity is the answer