For an experiment comparing more than two treatment conditions or more than two groups, you should use analysis of variance (ANOVA), rather than separate \( t \) tests. True False

Find the standard deviation of \( x \), given that \( \Sigma 4 x^{2}=14600, \Sigma 2 x=420 \) and \( n=20 \).

\( \alpha \) (alpha) is also known as the probability of failing to reject the \( H_{0} \) when it is false. True False

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 \( Q_{1}, Q_{2}, Q_{3} \) \( Q_{1}=\square \) \( Q_{2}= \) \( Q_{3}= \)

\( Q_{1}=14 \) \( Q_{2}=18 \) \( Q_{3}=24 \) (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.

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