A researcher uses chi-square to examine the association between gender and the presence of migraine headaches.  The null hypothesis for this study would be:

A researcher studied 100 patients to determine if there was a significant difference among five drugs for relief of arthritis pain.  Pain was measured using a standardized scale from 0-100, with 0 indicating no pain.   The decrease in pain over 1 month was evaluated.  A one-way ANOVA was significant, and the results below show the amount of pain relief using a Student-Newman Keuls comparison.  Which of the following statements is not a correct conclusion?

A researcher has established a correlation of –.29 (p = .002) between knee strength and weight in adults.  Based on this outcome, the relationship between strength and weight is:  

For a redox reaction to be broken into half reactions, which of the following steps would be the ideal place to start? 

Which of the following terms best describes a strip of metal that would best serve the purposes of electrochemistry?

Which of the following terms best describes the half-cell where reduction takes place?

Find the Taylor series for f(x) centered at a = 4

Use the Maclaurin series for cos(x) to compute sin(4°) correct to five decimal places. (Round your answer to five decimal places.)  

Find the interval and radius of convergence, R, of the series.

Match each term (I – VII) with its definition (a – g)   I. first law of thermodynamics II. entropy III. heat engine IV. internal energy V. irreversible process VI. reversible process VII. second law of thermodynamics       a. a process in which both the heat engine system and the external environment theoretically can be returned to their original states b. a machine that uses heat transfer to do work  c. heat transfer flows from a hotter to a cooler object, never the reverse, and some heat energy in any process is lost to available work in a cyclical process  d. the sum of the kinetic and potential energies of a system’s atoms and molecules  e. any process that depends on path direction  f. the net heat transfer into a system minus the net work done by the system is equal to the system’s change in internal energy  g. a measurement of a system’s disorder and its inability to do work in a system