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158 KKU Science Journal Volume 39 Number 1 <strong>Review</strong><br />

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ÿ“¥“ °’√–π—π∑πå. (2538). ∑ƒ…Æ’·≈–«‘∏’°“√ ”√«®<br />

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ÿ√‘π∑√å π‘¬¡“ß°Ÿ√. (2546). ‡∑§π‘§°“√ ÿࡵ—«Õ¬à“ß. æ‘¡æå<br />

§√—Èß∑’Ë 5. °√ÿ߇∑æœ: ¡À“«‘∑¬“≈—¬‡°…µ√»“ µ√å.<br />

Cochran, W.G. (1977). Sampling Techniques.<br />

New York: John Wiley and Sons.<br />

Daroga Singh, M. A. (1986). Theory and Analysis<br />

of Sample Survey Designs. New Delhi,<br />

India.<br />

Mohanty, S. and Sahoo, J. (1995). A note on<br />

improving the ratio method of estimators<br />

through linear transformatiom using certain<br />

known population parameters. Sankhya B.<br />

57(1): 93-102.<br />

Bedi, P. K. (1996). Efficient Utilization of Auxiliary<br />

Information at Estimation Stage.Biometrical.<br />

Journal. 38(8): 973-976.<br />

Kadilar, C. and Cingi, H. (2006). An improvement<br />

in estimating the population mean by using<br />

the correlation coefficient. Hacettepe<br />

Journal of Mathematics and Statistics. 35(1):<br />

103-109.<br />

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