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Shalu wrote at 2013-09-23 06:29:31
Solution: The Null Hypothesis

The intelligence is a random function i.e.

The intelligence is not a random function i.e.

Given, Median = 1.8

Replacing each value greater than and equal to 1.8 with plus signs and below 1.8 with minus sign

Let x is the variable assigned to 11 students

x ( students)   Sign

1.5

2.2

0.9

1.3

2.0

1.6

1.8

1.5

2.0

1.2

1.7   -

+

-

-

+

-

+

-

+

-

-

Total Plus (+) Sign, X = 4

Total Minus (-) Sign, Y = 7

We have to find that whether 4 plus sign observed in 11 students group supports the null hypothesis p=1/2 or alternate hypothesis p>1/2.

Here,

Absolute value of computed Z i.e.

Absolute value of tabulated Z i.e.

Since computed

Therefore, we conclude that, the intelligence is a random function.

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