Q1) Find the curve of second degree of regression of y on x (
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Fit a straight line to the following data:’ x 0 1 2 3 4 y 1 1.8 3.3 4.5 6.3
The average income of persons was Rs.210 with a S.D. of Rs. 10 in sample of 100 people of a city. For another sample of 150 persons, the average income was Rs. 220 with S.D. of Rs. 12. ...
Two types of new cars produced in India are tested for petrol mileage. One group consisting of 36 cars averaged 14kms. per litre. While the other group consisting of 72 cars averaged 12.5 kms per litre.(a) What test statistic is ...
The average marks in mathematics of a sample of 100 students was 51 with a standard deviation of 6 marks. Could this have been a random sample from a population with average marks 50?
A Machine produced 16 defective articles in a batch of 500. After over hauling it produced 3 defectives in a batch of 100. Has the machine improved?