Question # 1

Which of the following average cannot be calculated from the observation 2,2,4,4,6,6,8,8,10,10

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Mean

Median

Mode

All of these

If mean = 25 and variance is also 25, then coefficient of variation is

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100%

25%

20%

10%

The bionomial probability distribution is symmetrical when

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p = q

p < q

p > q

np > npq

In which distribution the successive trials are without replacement.

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Hypergometric distribution

Bionomial dristribution

Continuous distribution

None of these

The number of terms in the expansion of the binomial (p+q)ⁿ is.

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n

n-1

n+1

2n

test2

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3

4

2

When sample space S is partitioned into some mutually exclusive events such that their union is sample space itself. Then the events are called

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Simple events

Compound events

Equally likely events

Exhaustive events

Why are the outcomes of a coin tossing mutually exclusive.

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The outcome of any toss is not affected by teh outcome of those preceding it.

Both a head and a tail cannot turn up on any one toss

The probability of getting a head and the probability of getting a tail is the same.

All of these

Y₃+y₄+......+y₁₅ =

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Σ¹⁵ _i=1 Y₁

Σ¹⁵ _i=3 Y₂

¹⁵Σ_i=3 Y_i

¹⁵Σ_i=3Y_i²

The standard deviation of a binomial distribution depends on.

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Probability of success

Probabiliyt of failure

Number of trials

Both a and c

Variance of binomial distribution is

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np

√npq

npq

nq

The most popular measure of dispersion in industry and meteorology is.

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Range

Quartile deviation

Mean deviation

Standard deviation

What is teh major assumption we make when computing a mean from grouped data.

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All values are discrete

Eveery value in a class is equal to the midpoint

No value occurs more than once

Each class contains exactly the same number of values

Range of the ungroup data can be calculate by formula.

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X_m - X_m

X_m - X₀

X₀

X₀ - X_m

If the values in a sereis are not of equal importance, we compute the.

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Median

Mean

Weighted mean

Harmonic mean

Histogramis a graph of.

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Qualitative data

Time sereis

Ogive

Frequency distribution

Which is the most suitabel average in chain base method.

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Arithemetic mean

Median

Geometric mean

Weighted arithmetic mean

The parameters of hypergeometric distribution are:

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n,k & p

n, k & q

n, p & q

n, k & N

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