# XI_Maths_Statistics_4 Online Test

Circles-Two dimensional diagram

Multibars-One dimensional diagram.

Pictograms-Abstract representation of data

Ogive-Used to determine median

The standard deviation for the data: 7,9,11,13,15 is:

2.4

2.5

2.7

2.8

The average weight of a group of 20 boys was calculated to be 89.4 kg and it was later discovered that one weight was misread as 78 kg instead of the correct one of 87 kg, then the correct average weight is:

88.95 kg

89.25 kg

89.55 kg

89.85 kg

The mean score of 12 students, in an examination, was 52.5. Later, on scrutiny, the scores of two students were changed from 45 and 51 to 40 and 62, respectively. The corrected mean score of all students is:

52.6

52.8

53.0

53.5

In 1989 the numbers of workers in the Union were 4450 of which 4000 were male. The non-Union workers were 800 of which 350 were female. The total number of male workers would be:

400

800

5250

4450

For a symmetric distribution, the empirical relationship between mean, median and mode is:

Mean > Median > Mode

Mean = Median = Mode

Mode –Mean =3(Median –Mean)

Mean –Mode =3(Mean –Median)

Consider the following techniques for collecting statistical data: 1. Census 2. Sample Survey 3. Direct Enquiry 4. Indirect Enquiry Which of these are best suited to collect the Statistics of income of a group of persons?

1 and 4

1 and 3

2 and 3

2 and 4

In a histogram heights of rectangles are:

Always proportional to the frequencies of the classes

Proportional to the frequency densities if the classes of distributions are not of equal size

Always proportional to the cumulative frequencies of the classes

Proportional to the cumulative frequencies only when classes of distribution are of the equal size

A student represents his scores in Mathematics, MATHEMATICS, Statistics, SSC, CAT, MAT, Bank PO and Economics in a pie chart. The central angle for Mathematics is 120o. He scored 96 in MATHEMATICS, Statistics, SSC, CAT, MAT, Bank PO and 84 in Economics. His score in Mathematics is:

86

88

90

92

The mean daily profit made by shopkeeper in a month of 30 days was Rs.350. If the mean profit for the first fifteen days was Rs.275, then mean profit for the last fifteen days would be:

Rs.200

Rs.275

Rs.350

Rs.425

**Description:**

This test consist of 10 questions.Students should ideally take 10 minutes to complete the test. This test is useful for those students who are preparing for IIT JEE, AIEEE or any other engineering entrance test. This test cosist of questions from Statistics which, in general, is focused in AIEEE and IIT JEE. Last year 3 questions was asked from this chapter in AIEEE. In Statistics, deviations and variance are key topics and mostly application based questions are asked.

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