Business Statistics And Research Methods - Study Mode

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[#676] What is the main disadvantage of the standard deviation?

(A) It is used in many other statistical techniques

(B) It takes into account all the valuesin the data set

(C) It is a sensitive measure of dispersion

(D) It is difficult to calculate by hand

Correct Answer

(D) It is difficult to calculate by hand

[#677] Null hypothesis and alternatives hypothesis is denoted by

(A) H 0 , H 1 respectively

(B) H 1 , H 0 respectively

(C) α, β respectively

(D) None of these

Correct Answer

(A) H 0 , H 1 respectively

[#678] The regression equation of profits (X) on sales (Y) of a firm is given as: 3Y - 5X + 110 = 0. If the sales of the firm is Rs. 4,400, the profit will be

(A) Rs. 23,370

(B) Rs. 26,422

(C) Rs. 24,422

(D) Rs. 21,370

Correct Answer

(B) Rs. 26,422

[#679] Match the items of List-II with the items of List-I and select the option of correct matching. List-I List-II a. Chi-square test 1. Testing the significance of the differences of the mean values among more than two sample groups b. ANOVA (F-test) 2. Testing the goodness of fit of a distribution c. Z-test 3. Testing the significance of the difference of the mean values between two large sized samples d. T-test 4. Testing the significance of the difference of the mean values between two small sized samples when population standard deviation is not available

(A) a-1, b-2, c-3, d-4

(B) a-4, b-3, c-2, d-1

(C) a-1, b-2, c-4, d-3

(D) a-2, b-1, c-3, d-4

Correct Answer

(D) a-2, b-1, c-3, d-4

[#680] Chi-square is to be applied only, when the individual observations of sample are

(A) dependent

(B) independent

(C) Both A and B

(D) Neither A nor B

Correct Answer

(B) independent