11
$$F = \frac{{{S^2}_1}}{{{S^2}_2}}$$ is a
A)
z-test
B)
F-test
C)
Z-test
D)
mean test
Answer & Solution
Answer: Option
B
12
Most experimental subjects try to help the researcher by doing their best to perform as they think they should. This problem is called
A)
the placebo effect
B)
the Hawthorne effect
C)
the self-fulfilling prophecy
D)
demand characteristics
Answer & Solution
Answer: Option
D
13
The inventory application is designed to
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
Answer & Solution
Answer: Option
D
14
The probable error can be calculated by
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)
$$0.6325 \times \frac{N}{{\sqrt {d{x^2}d{y^2}} }}$$
Answer & Solution
Answer: Option
A
15
Match the following.
List-I List-II
a. Judgement
1. Probability sampling
b. Stratified
2. Non-random sampling
c. Cluster
3. Non-probability sampling
d. Quota
4. Random sampling
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
Answer & Solution
Answer: Option
A
16
Which of the following statements are true?
A)
Both 1 and 3
B)
Both 3 and 4
C)
1, 2 and 4
D)
All of the above
Answer & Solution
Answer: Option
C
17
The form of alternative hypothesis can be
A)
one tailed
B)
two tailed
C)
neither A nor B
D)
both A and B
Answer & Solution
Answer: Option
D
18
The value of Karl Pearson's co-efficient of correlation may be
A)
±1
B)
±3
C)
±2
D)
±4
Answer & Solution
Answer: Option
A
19
Control methods are used to
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
Answer & Solution
Answer: Option
D
20
If p = q = $$\frac{1}{2}$$, the frequency distribution will be
A)
perfectly symmetrical
B)
non-perfectly symmetrical
C)
zero
D)
+1
Answer & Solution
Answer: Option
A
