Business Statistics

A. z-test

B. F-test

C. Z-test

D. mean test

A. the placebo effect

B. the Hawthorne effect

C. the self-fulfilling prophecy

D. demand characteristics

A. Bring out cost of production of a product

B. Bring out cost of inventory

C. Bring out inventory status affected by inventory transactions

D. None of these

A. $$0.6745\left[ {\frac{{1 - {r^2}}}{{\sqrt N }}} \right]$$

B. $$0.6745\sqrt {\frac{{d{x^2}d{y^2}}}{N}} $$

C. $$0.6320 \times \frac{N}{{\sqrt {dx} }}$$

D. $$0.6325 \times \frac{N}{{\sqrt {d{x^2}d{y^2}} }}$$

A. a-2, b-1, c-4, d-3

B. a-2, b-3, c-4, d-1

C. a-4, b-1, c-2, d-3

D. a-2, b-1, c-3, d-4

A. Both 1 and 3

B. Both 3 and 4

C. 1, 2 and 4

D. All of the above

A. one tailed

B. two tailed

C. neither A nor B

D. both A and B

A. ±1

B. ±3

C. ±2

D. ±4

A. Determine sample size and reliability of results

B. Determine cost and time involved

C. Determine sample units to be studied and measurement

D. Check accuracy, coverage, analysis and interpretation

A. perfectly symmetrical

B. non-perfectly symmetrical

C. zero

D. +1