A cooling fan producer has made a recent purchase from a fan wing producer and is not satisfied with the amount of variation in wing lengths. For this purpose they decide that further investigation is...

Extracted text: A cooling fan producer has made a recent purchase from a fan wing producer and is not satisfied with the amount of variation in wing lengths. For this purpose they decide that further investigation is needed and randomly selects 25 wings and measure the lengths. They find that the sample variance is 15 cm. What will be the lower limit of the 90% confidence interval for the standard deviation? (Assume that lengths are approximately Normally distributed) O A. 9.886 В. 3.144 ОС. 33.160 D. 5.758