Business Statistics And Research Methods - Study Mode
[#486] Harmonic mean is calculated by dividing the number of observations by the reciprocal of each number in the series. Thus, the harmonic mean is:
Correct Answer
(A) the reciprocal of the arithmetic mean of the reciprocals
[#487] Regression analysis measures:
Correct Answer
(D) Functional relationship between X and Y variable
[#488] Match the following. List-I List-II a. Diagrammatic representation 1. Geographical, chronological, qualitative, quantitative b. Graphic representation 2. Ungrouped, grouped c. Frequency distribution 3. Bar diagram, pie chart, pictogram d. Classification of data 4. Histogram, frequency polygon, ogive
Correct Answer
(B) a-3, b-4, c-2, d-1
[#489] Which of the following is correct? 1. Large sample, n > 30 2. Small sample, n < 20 3. Probability of type I error (α) is also called significance level of least. 4. Accepting the null hypothesis, when it is false is called type II error. Select the correct answer using the options given below
Correct Answer
(C) 1, 3 and 4
[#490] Which of the following are the positional averages? 1. Mean 2. Median 3. Mode
Correct Answer
(B) Both 2 and 3