Test Details

Correlation and Regression

Jan 05, 10:00 AM

10 minutes

Jan 05, 10:10 AM

16.0 marks

MCQ

16 questions

Shefali Singha

I am a Mathematics teacher . I used to teach mathematics in St. Xavier's School, Jamshedpur.

Class Details

Mathematics

Class12

Mathematics

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Question Text

Question 1 :
A hockey stick pushes a ball at rest for 0.01 second with an average force of 50 N. If the ball weighs 0.2 kg, then the velocity of the ball just after being pushed is

Question 2 :
The mode of the distribution <table> <tr><th>Marks</th> <th>students</th> </tr> <tr><td>(A) 4</td> <td>(i) 6</td> </tr> <tr><td>(B) 5</td> <td>(ii) 7</td> </tr> <tr><td>(C) 6</td> <td>(iii)10</td> </tr> <tr><td>(D) 7</td> <td>(iv)8</td> </tr> <tr><td>(E) 8</td> <td>(v)3</td> </tr>

Question 3 :
S.D. of data is 6 when each observation is increased by 1, then the S.D. of new data is

Question 4 :
Two bodies of masses m and 4m are moving with equal momentum. The ratio of their K.E. is

Question 5 :
Three like parallel forces P, Q, R act at the corner points of a triangle ABC. Their resultant passes through the circumcenter, if

Question 6 :
The resultant of three forces represented in magnitude and direction by the sides of a triangle ABC taken in order with BC = 5 cm, CA = 5 cm, and AB = 8 cm, is a couple of moment

Question 7 :
Coefficient of correlation between observations(1, 6),(2, 5),(3, 4), (4, 3), (5, 2), (6, 1) is

Question 8 :
A train of length 200 m travelling at 30 m/sec. overtakes another of length 300 m travelling at 20 m/sec. The time taken by the first train to pass the second is

Question 10 :
Given that the regression coefficients are - 1.5 and 0.5, the value of the square of correlation coefficient is

Question 11 :
The quartile deviation of daily wages (in Rs.) of 7 persons given below 12, 7, 15, 10, 17, 19, 25 is

Question 12 :
If for a slightly assymetric distribution, mean and median are 5 and 6 respectively. What is its mode

Question 13 :
If the resultant of two forces of magnitude P and 2P is perpendicular to P, then the angle between the forces is

Question 14 :
In a class of 100 students, there are 70 boys whose average marks in a subject are 75. If the average marks of the complete class are 72, then what are the average marks of the girls

Question 15 :
A man of mass 80 kg. is travelling in a lift. The reaction between the floor of the lift and the man when the lift is ascending upwards at 4 m/sec<sup>2</sup> is

Question 16 :
The median of a set of 9 distinct observations is 20.5. If each of the largest 4 observation of the set is increased by 2, then the median of the new set

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