You are working for a life insurance company investigating differences in life expectancy in different Australian cities. From a sample of 49 customers in Adelaide, the sample mean is 4.631 and the sample variance is 143.968. From a sample of 50 customers in Canberra, the sample mean is 7.159 and the sample variance is 37.723. We would like to test whether or not the population variance of life expectancy are equal or unequal across the two cities. Which of the following statements are true? (select all that apply)

Group of answer choices

There is not enough evidence to conclude that variances are not equal

One critical value (to 3 decimal places) is 1.766

One possible test statistic (to 3 decimal places) is 1.546

One possible test statistic (to 3 decimal places) is 3.816

We conclude that variances are not equal

One critical value (to 3 decimal places) is 1.61