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What is the variance of the sufficient estimator for estimating the parameter ) of the
Poisson population on the basis of sample of size n ?

കു ഡ്മ, 8) 2 © 0 ‏(م‎ 2

Atest that is used for testing the equality of means of several normal populations having
unknown but common variance ¢

ಹಿ) Chi-square B) ANOVA C) Normal D) t

Probability of rejecting a null hypothesis when it is true is called
A) Type 1error B) Type 2 error

C) Power D) Significance level

If the two regression equations are 3x + 2y — 80 =0 and 2x + 3y — 70 = 0, the value of
correlation coefficient is

A) -2/3 B) 2/3 0-1 0) 1

The regressionlines of Y on X and Xon Y are Y =aX + b and X =cY + d. Then the ratic
of the standard deviations of X and Y is

A) alc 8) ೦೩

0) (೫೦) D) ஸை

In exponential trend equation Y = ab*, the values of X and Y are in the form of
A) HP, AP B) AP, GP
C) AP, HP D) GP, HP

The seasonal indices of sales of a firm in the following quarters are for Jan.— Mar.— 100,
Apr. — Jun. — 89, Jul.— Sep. — 83, Oct.— Dec. — 128 respectively. If the total sales in
Jan.—Mar. of the year be worth Rs. 10,000. How much worth of items should be keptin
stock by the firmin Apr.—Jun. to meet the demand ?
A) 400 B) 1,000
C) 8,900 D) 8,300

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