Variance of the random variable
We randomly choose letters, one at a time, without replacement, from the word, CHOOSE until both Os have been obtained. Find the variance of the random variable.
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Suppose a linear programming (maximization) problem has been solved and the optimal value of the objective function is $300. Suppose a constraint is removed from this problem. Explain how this might affect each of the following:
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Find the 98% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal
Use a suitable statistical computer program to test whether the mean failure time of such light bulbs is significantly less than 300 hours. Use the 0.01 level of significance.
Is it correct that a loan oran advance by a private limited company to a shareholder of the company is considered as payment of dividend? Explain your views.
Certain radioactive substance is a random variable having the Poisson distribution with lambda = 2.4. Use the following data obtained for 300-1 second intervals to test this null hypothesis at the 0.05 level of significance.
The president of Ferneti Company is puzzled. During the last year,the company experienced a net loss of 800,000, yet its cashincreased 300,000 during the same period of time. Explain to the president how this could occur.
Tests of the fidelity and the selectivity of 190 radios produced the results shown in the following table: Use the 0/01 level of significance to test the null hypothesis that fidelity independent of selectivity.
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