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Statistics Set 5

Question - 15 Maximum mark : - 15

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Statistics Set 5

1.

The standard deviation of the data:
$x:$ $1$ $a$ $a^{2}$ $...$ $a^{n}$
f: $nC_{0}$ $nC_{1}$ $nC_{2}$ $...$ $nC_{n}$
is

✘

✘

✘ None of these ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

2.

If var

8.25, var

33.96 and

then the correlation coefficient is

0.89 ✘ -0.98 ✘ 0.61 ✘ -0.16 ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

3.

If the difference between the mode and median is 2, then the difference between the median and mean is (in the given order)

2 ✘ 4 ✘ 1 ✘ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

4.

If the lines of regression are

will be

0.289 ✘ -0.289 ✘ 0.209 ✘ None of these ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

5.

If

, then

equals

02-May ✘ -0.2 ✘ 03-May ✘ -0.4 ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

6.

A statistical measure which cannot be determined graphically is

Median ✘ Mode ✘ Harmonic mean ✘ Mean ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

7.

The mean of

observations is

. If one observation

is added, then the mean remains same. The value of

is

1 ✘

✘

✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

8.

Let

be

observations with mean

and standard deviation

Then the standard deviation of the observations

is

✘

✘

✘

✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

9.

The positional average of central tendency is

GM ✘ HM ✘ AM ✘ Median ✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

10.

The mean of a set of observations is

. If each observation is divided by,

and then is increased by 10, then the mean of the new set is

✘

✘

✘

✔ NULL ✔ NULL NULL

Answer & Solution Discuss in Board Save for Later

Answer & Solution

Answer: Option B

Solution:

It provides fallback for IE8.

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