## Answers

a 1 liven that n=36; o=0.113 Rolo = 0.1 (90% confidence) Here "o" is known. So, we have to use } critical value.

.
At x = 0. lol Zo.1 = 1.645. Here x: hatimal retail price. from the given data EX = (2.23+2:16+...+2.19+2-26) = 76.99 point Estimate (ů) = x=458x=2 hou 36 MEX= 2.1386 Standard Error () - S.E.18) = OV = 0-13 S.E.1x) = 0.0188 is F ZO., S.E.(FJ) The 90% c. I for ( 2.1386 + (.645) (0.0188)) ( 2.1386 + 0.03 09) ( 2.11, p.17) confident that, the population 9o.n Interpretation.

- 76.99 A L ova 136 price for the and 2.17 retail 2.11 of is average Product the national les between

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