Calculate (90)+ (42)+ (72)+ (70) - Vidyadip

Question

Calculate $\varphi(90)+\tau(42)+\sigma(72)+\mu(70)$

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Answer

226

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Read the following text and answer the following questions on the basis of the same:
Eight pots growing three barley plants each were exposed to high tension discharge, while nine similar pots were enclosed in an earthed wire cage. The numbers of tillers in each pot were as follows:

Given that the value of t for 15 degree of freedom at 5% level of significance is 2.131. "

Q.1. Mean tillers of caged sample is:
(A) 23 (B) 18 (C) 9 (D) 8

Q.2. Mean tillers of electrified sample is:
(A) 23 (B) 18 (C) 9 (D) 8

Q.3. The formula for standard error is:
(A) $s=\sqrt{\frac{\sum(x-\bar{x})^2+\sum(y-\bar{y})^2}{n_1+n_2-2}}$
(B) $s=\sqrt{\frac{\sum(x-\bar{x})^2+\sum(y-\bar{y})^2}{n_1-n_2-2}}$
(C) $s=\sqrt{\frac{\sum(x+\bar{x})^2+\sum(y+\bar{y})^2}{n_1+n_2-2}}$
(D) $s=\sqrt{\frac{\sum(x-\bar{x})^2+\sum(y-\bar{y})^2}{n_1+n_2}}$

Q.4. The formula for two sample t-test is:
(A) $t=\frac{\bar{x}+\bar{y}}{s} \sqrt{\frac{n_1 n_2}{n_1+n_2}}$
(B) $t=\frac{\bar{x}-\bar{y}}{s} \sqrt{\frac{n_1-n_2}{n_1+n_2}}$
(C) $t=\frac{\bar{x}-\bar{y}}{s} \sqrt{\frac{n_1 n_2}{n_1-n_2}}$
(D) $t=\frac{\bar{x}-\bar{y}}{s} \sqrt{\frac{n_1 n_2}{n_1+n_2}}$

Q.5. If the calculated value for t-test is 2.751, then which of the following statement is true:
(A) The electrification does exert some effect on the tillering.
(B) The electrification does not exert some effect on the tillering.
(C) Can't say.
(D) None of these.

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