In a Hypothesis Test for the Population Variance,the Hypotheses Are $\sigma$

Multiple Choice

In a hypothesis test for the population variance,the hypotheses are H₀: $\sigma$ ² = 30 vs.H₁: $\sigma$ ² < 30.If the sample size is 20 and the test is being carried out at the 5% level of significance,the null hypothesis is rejected if:

A) $\chi$ ² < 30.144.
B) $\chi$ ² > 10.851.
C) $\chi$ ² < 10.117.
D) $\chi$ ² > 31.410.