F-tests and t-tests are usually used to determine whether the experimental groups are significantly different from each other at a certain alpha level. True False

\( Q_{1}=14 \) \( Q_{2}=18 \) \( Q_{3}=24 \) (b) Interpret the meaning of the first quartile \( Q_{1}: \) Select an answer \( \sim \% \) of companies in the auto parts business have estimated market values that are Select an answer \( \checkmark \$ \) Select an answer \( \checkmark \) million dollars.

The following data are the estimated market values (in millions of dollars) of 12 companies in the auto part business: \( 22,20,15,16,38,11,13,10,19,26,17,30 \) Round your answers in part (a) to 1 decimal place. (a) Calculate the values of \( Q_{1}, Q_{2}, Q_{3} \) \( Q_{1}=\square \) \( Q_{2}= \) \( Q_{3}= \)

24. What is the \( y \)-intercept of the trend line equation, and what does it mean in the context of the situation?

Complete the statement below. point estimate confidence interval critical value the value of a statistic that estimates the value of a parameter. confidence level

A population of values has a normal distribution with \( \mu=111.2 \) and \( \sigma=39 \). You intend to draw a random sample of size \( n=231 \). Please show your answers as numbers accurate to 4 decimal places. Find the probability that a single randomly selected value is between 109.1 and 116.8 . \( P(109.1<X<116.8)=\square \)