table check constraint

A linear equation represents a straight line. Limited time, labour etc. may be expressed as linear inequations or equations and are called constraints. e.g., If 2 tables and 3 chairs are to be made in not more than 10 hours and 1 table is made in x hours while 1 chair..

Check whether the population variances differ significantly at 90% confidence. Also find out F-test value. The data relating to two samples from those populations are shown in the table. Sample size Sample variance 25 7 16 5.6 => 2.11, do not differ or 2.29, differ or 2.23, do n..

For the data shown, find the test value and check whether the means differ at 95% confidence. First 45 67 23 78 Second 50 60 30 69 => 0.123, the means differ or 0.282, the means do not differ or 0.245, the means do not differ or 0.141, the means differ..

In a statistics class students were asked to determine if they sleep more number of hours on weekends than on weekdays. Five students gave the data shown. Check whether there is a difference in both the means at 95% and 99%. Weekdays 8 7.5 6 5.5 9 Weekends 10 9 9 8 12 => differ at 95% and..

The data corresponding to the number of leaves taken per year by married and unmarried employees of a company is shown. Find the test value and check whether both the means differ at 99% confidence. Married 50 52 60 46 Unmarried 56 48 62 40 => - 0.243, the means do not differ or - 0.21, t..

on the scabs Spread of several diseases can be controlled by proper preventive and sanitary measures. Diseases like rinderpest, anthrax, cowpox, tuberculosis, bovine abortion, calf diphtheria and other contagious diseases can be checked with vaccinations. Applying a dilute solution of lin..

The students of a class were given a test in Statistics. Then they were given coaching for some days and the test was repeated. The results are as shown. Find the test value and check whether the performance improved at 99% confidence. Before (X 1 ) 35 32 25 28 45 After (X 2 ) 42 30 30 25..

The data corresponding to the level of red blood cells in men and women of 27 years of age is given. Find the test value and check whether the means differ at 99% confidence. Men 3.06 2.87 3.6 3.52 Women 1.34 1.70 2.9 1.5 => 2.808, the means do not differ or 5.616, the means do not differ..

The data corresponding to the number of grammatical errors made by six students before and after introducing a new grammar program is given. Find the test value and check whether the errors reduced at 99% confidence. Before (X 1 ) 12 8 5 4 0 2 After (X 2 ) 8 4 1 1 0 0 => 4.327, the errors..

The senior surgeon of St. Ann's hospital claims that many patients who undergo heart surgery build up anxiety. Six patients were tested for anxiety before and after the surgery. The test results indicating the level of anxiety are tabulated. Find the test value and check whether his claim..