In the Process of Collecting Weight and Height Data from 29

question 41

Essay

In the process of collecting weight and height data from 29 female and 81 male students
at your university, you also asked the students for the number of siblings they have.
Although it was not quite clear to you initially what you would use that variable for, you
construct a new theory that suggests that children who have more siblings come from
poorer families and will have to share the food on the table.Although a friend tells you
that this theory does not pass the "straight-face" test, you decide to hypothesize that peers
with many siblings will weigh less, on average, for a given height.In addition, you
believe that the muscle/fat tissue composition of male bodies suggests that females will
weigh less, on average, for a given height.To test these theories, you perform the
following regression: $$\begin{array}{l}\begin{array} { l } \widehat { \text { Studentw } } = - 229.92 - 6.52 \times \text { Female } + 0.51 \times \text { Sibs } + 5.58 \times \text { Height } , \\ \quad \quad \quad \quad \quad \quad \quad(44.01)(5.52) \quad \quad \quad \quad \quad \quad(2.25) \quad \quad \quad\quad(0.62) \\\end{array}\\\\R ^ { 2 } = 0.50 , S E R = 21.08\end{array}$$ where Studentw is in pounds, Height is in inches, Female takes a value of 1 for females
and is 0 otherwise, Sibs is the number of siblings (heteroskedasticity-robust standard
errors in parentheses).
(a)Carrying out hypotheses tests using the relevant t-statistics to test your two claims
separately, is there strong evidence in favor of your hypotheses? Is it appropriate to use
two separate tests in this situation?

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Examine the effects of the Cold War on US foreign policy and national security strategy.

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Definitions:

Flagellum

A slender, whip-like appendage that enables many protozoa, bacteria, and spermatozoa to swim.

Microvilli

Minute projections of the plasma membrane that increase the surface area of the cell; found mainly in cells concerned with absorption or secretion, such as those lining the intestine or the kidney tubules.

Choanoflagellate

Single-celled organisms that are considered to be the closest living relatives of animals, characterized by a flagellum surrounded by a collar of microvilli.

Rhizaria

A supergroup of mainly unicellular eukaryotes, characterized by their amoeboid movement mechanism and often elaborate shells.