sample value

Choose the incorrect statement(s). I. A statistic is a numeric descriptive measure of a population. II. The sampling error is the difference between the population value of interest and sample value. III. If the sample is randomly selected from the ..

If the degrees of freedom of the numerator is 15 and that of the denominator is 24 for testing the variances of two populations using F-test, then find the test value and the critical value at 95% confidence. The sample variances are 45 and 78. => 2.65, 1.83 or 1.73, 2..

The number of best friends for a sample of 10 students in third and in seventh grade are shown in the table. Find the F-test value and verify whether the variances differ at 90% confidence level. => 1.91, do not differ or 3.18, do not differ or 0.524, differ or 1.91, differ..

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, ..

A sample of 150 people out of 240 from an industrial community and 60 out of 90 people from a rural communtiy suffered from a lung disease. At 90% confidence level, find the test value and verify if their proportions differ significantly. => 0.708, the proportions do not differ ..

Select the correct statement(s). I. A point estimate is a specific numerical value estimate of a parameter. II. The sample mean is a better estimator of the population mean than the sample median or sample mode. III. Of all the statistics that can be used to ..

Select the incorrect statement. I. For a 95% confidence interval for the mean, when the sample size is 26, the value of t ∝ /2 is 2.036. II. For a 98% confidence interval for the mean, when the sample size is 19, the value of t ∝ /2 is 2.552. III. F..

The critical t value for a sample size of 15 is - 1.542. The test is left tailed. What is the interval of p -value in the t test? => between 0.10 and 0.20 or between 1.345 and 1.761 or between 0.05 and 0.10 or cannot be determined..

The critical t value for a sample size of 25 is 1.709. The test is right tailed. What is the upper boundary of the p -value in the t test? => 2.060 or 0.10 or 0.05 or 1.711..

From a random sample of 36 restaurents in a particular city, the average cost per dinner was reported as $26.50. What is the test value if the population mean is $25 with standard deviation of $4.40 and α = 0.01? Can we say that the sample comes from this populat..