r square variance

The daily income in dollars of 5 workers is 100, 101, 104, 103, 102. Find the square root of variance in dollars. => 3.1 or 1.0 or 2 or 1.4..

To calculate the confidence interval for variance or standard deviation, a statistical distribution called ______ is needed. => chi-square distribution or binomial distribution or poisson distribution or multinomial distribution..

Find the critical value of the chi-square test for a variance with 20 degrees of freedom, at α = 0.05 and test is right tailed. => 30.144 or 31.410 or 10.117 or 10.851..

Find the critical values of the chi-square test for a variance with 28 degrees of freedom, α = 0.10 and the test is two tailed. => 41.337, - 41.337 or 18.939, 37.916 or 18.114, 36.741 or 16.928, 41.337..

Past records indicated that the variance of scores in final exams of the high school students was 6.16. New techniques were adopted for teaching and it was observed that in a random sample of 80 students, the variance of scores after the final exam is 6.42. Find the chi-squ..

Since square root of a negative number is not real, we define a function f : R + R such that ..

A manufacturer of bulbs claims that the variance of the span of life of the bulbs is 320 hours. The inspection department selected a random sample of 15 bulbs and found the variance as 210 hours. Find the chi-square test value. At α = 0.05, is there enough eviden..

According to a traffic survey, the variance of the number of cars crossing traffic junction around noon is 9.6 per hour. Observations by the traffic controller for 25 days indicated the variance as 11.6 per hour. At α = 0.05, find the chi-square test value and p ..

ABCD is a square of area 36 cm 2 . Find the area of the shaded part if P, Q, R and S are the midpoints of the sides. => 31.5 cm 2 or 22.5 cm 2 or 27 cm 2 or 32 cm 2..

In a statistical hypothesis testing for a variance, the test value of chi-square, c 2 = 32.426, n = 18, and the test is right tailed. Find the P-value interval for the test. => 0.01 < p -value < 0.025 or 0.02 < p -value < 0.05 or information is not sufficient or 0.97..