Chi-Square Distribution

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Proctor, W. R., Hirdes, J. P. 2001. Pain and cognitive status among nursing home residents in Canada. Pain Research & Management. 6 (3) 119-25.

Kiely, D. K., Mitchell, S. L., Marlow, A., Murphy, K. M., Morris, J. N. 2001. Racial and state differences in the designation of advance directives in nursing home residents. Journal of the American Geriatrics Society. 49 (10) 1346-52.