An investigator wants to show that first-born children score higher on iq tests than second-borns. he takes a simple random sample of 400 two-child families in a school district, both children being enrolled in elementary school. he gives these children the wisc vocabulary test, with following results: the 400 first-borns average 29 and their sd is 10. the 400 second-borns average 28 and their sd is 10. does the result support the research hypothesis?

when rotating a figure 180 degrees, imagine that you are able to take the figure and turn it clockwise or counterclockwise around a center point. to rotate a figure 180 degrees, you will need to apply the rule (x, y) → (-x, -y). start by using a coordinate grid with coordinates for each vertex of the figure. the center point of the coordinate grid is located at (0, 0), which is what you will rotate the figure around. write down the original coordinates of the shape you are going to rotate. then, apply the rule. for example, coordinate (1, 2) becomes (-1, -2). another example would be, coordinate (-4, -2) becoming (4, 2). after you change each original coordinate to the rotated coordinate, you will draw your new figure.

step-by-step explanation:

she will travel a distance in the range of 3 - 11 miles

final total: 63

step-by-step explanation:

60 times sales tax

60 times 0.05

3

60 + 3

63

the area of the rectangle is 35units^2.

step-by-step explanation:

graph it and find the distance.

it is a 5*7 rectangle.

therefore the area is 35units^2.