The mean wage of 100 labourers working in a factory running two shifts of 60 and 40 worker responsibility is Rs. 38. The mean wage of 60 labourers working in the morning shift is Rs. 40. Find the mean wage of 40 labourers working in the evening shift

What do you understand by

1. Primary and secondary data
2. Data Classification
3. Measure of central tendency
4. Characteristic of good average

Construct an appropriate diagram to show the following data. of a University

(8 Marks)

For the following distribution of statistics test grades, consent a frequency polygon and answer the following :

1. How many test grades are greater than 87 ?
2. What percentage of test grades are greater than 83 ?
3. What percentage of test grades are lower than 72 ?
4. What percentage of test grades are between 72 & 79 (inclusive) ?

Test Grades :

73, 92, 89, 70, 95, 75, 80, 47, 88, 48, 48, 64, 86, 79, 72, 71, 77, 93, 55, 75, 50, 53, 75, 85, 50, 82, 45, 40, 82, 60, 55, 60, 89, 79, 65, 54, 93, 60, 83, 99.

The marks obtained by 20 students in a subject are given :

32, 62, 72, 46, 52, 74, 59, 42, 58, 61, 59, 46, 36, 76, 58, 77, 62, 48, 36, 39.
From a frequency distribution table with class interval 10. Also draw the histogram.

In the year 2000 out of a total 1750 workers of a factory 1200 workers were members of a union. The number of women employed was 200 of which 175 did not belong to the union. In 2005. the number of union worker increase to 1510 of which 1290 were men. On the other hand the number of non union workers fell down to 208 of which 180 women.

1. Put the above information in a proper table with title.
2. Calculate the increase in the percentage of the female workers belonging to the union in that five year period

The mean monthly income of a person is Rs. 18190/- and his mean monthly expenditure comes out to be Rs. 17930/-. What is his average monthly saving?

In a statistical investigation of 1003 families of a city, it was found that 63 families had neither a radio nor a TV, 794 families had a radio and 187 had a TV. How many families of the city selected in the sample had both?

A hotel owner has nine refreshment stalls located at various points in a large compound. He wants to make one of the stalls as a supply place such that amount of travel between the stalls and the source of supply is minimized. He has to visit all stalls almost equal number of times with a view to supplying the refreshment stuff everyday. The distances of stalls from the first stall are 250, 500, 650, 800, 850, 910, 940 and 1000 yards respectively. Which stall should he choose to use as the supply place? Give reason in favour of your answer.

Prior to constructing a dam on river the engineers performed a series of tests to measure the water flow at the proposed location of the dam. The results of the testing were used to construct the following frequency distribution.

Construct an appropriate diagram to estimate what proportion of the flow occurs at less than 1300 thousands of gallons per minute. Give the estimate.