Search Warrant.
See Answer →Writing Complaints.
See Answer →Pigeonholing.
See Answer →Natural Science based positivism.
See Answer →Write whether the following data are discrete or continuous. Give reason in support of your answer.
(a) Number of children in a family in a colony of 1000 families.
(b) Number of pages in each of the 50 books having some mistake.
(c) Height of students of IGNOU who enrolled in 2021.
(d) Waiting time of metro when a person reaches metro station.
(e) Monthly income of the family.
See Answer →Write any 5 principles of data visualisation.
See Answer →Find values of x, y and z given that
You are bound to use the matrix techniques to solve the given equations.
See Answer →Evaluate the integrals:
How many different signals are possible with 5 blue, 4 red, 3 white and 2 green flags by using all at a time in a queue?
See Answer →Set having values is countable.
A carpenter was hired to build 320 window frames. The first day he made five frames and each day thereafter he made two more frames than he made the day before. How many days he will take to finish his job?
See Answer →State whether the following statements are True or False. Give a reason in support of your answer.
(a) Between any two different irrational numbers there is another irrational number.
(b)
(c)
(d) The range of the data shown in the following frequency distribution is 350.
| Classes | 20-25 | 25-30 | 30-35 | 35-40 | 40-45 | 45-50 | 50-55 |
| Frequencies | 0 | 7 | 3 | 8 | 4 | 0 | 0 |
In the given data, two frequencies are missing and its mean is found to be 1.46.
| No. of Accidents (x) | Frequencies (f) |
|---|---|
| 0 | 46 |
| 1 | ? |
| 2 | ? |
| 3 | 25 |
| 4 | 10 |
| 5 | 5 |
| Total | 200 |
Find the missing frequencies
See Answer →50% of items have characteristics A and B both, 35% have A, but not B, 25% have B but not A. Show that there must be some misprints in this report.
See Answer →Suppose X and Y are the two variables having the correlation coefficient 0.85. The following are the values they have:
| X | Y |
|---|---|
| 10 | 40 |
| 30 | 30 |
| 50 | 70 |
| 60 | 80 |
If two new variables X' and Y' are obtained by adding 50 to each value of X and 100 to each value of Y, respectively, calculate the correlation coefficient between X' and Y' using the above data. Also compare the results.
See Answer →(a) In a statistical study relating to the prices (in T) of two shares, X and Y, the following two regression lines were found as and
. The standard deviation of
, then find (i) the values of X and Y, (ii) r(X, Y), and (iii) standard deviation of Y.
Can vaccination be regarded as a preventive measure for smallpox from the given data:
(i) Of 1482 persons in a locality exposed to smallpox, 368 in all were attacked, and
(ii) Of 1482 persons, 343 had been vaccinated and of these only 35 were attacked.
An investigation of 23713 households was made in an urban and rural mixed locality. Of these 1618 were farmers, 2015 well to do and 770 families were having at least one graduate. Of these graduate families 335 were those of farmers and 428 were well to do; also 587 well to do families were those of farmers and out of them only 156 were having at least one graduate. Obtain all the ultimate class frequencies.
See Answer →Given the following data: ,
and
then find (i) r12.3 (ii) r13.2 (iii) r23.1 (iv) R1.23