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29) Linda is curious to know what factors contribute to the rate of hair growth. She collects a group of participants who have all reported that have average hair growth rate. She then treats a group with Shampoo X (claims to promote hair growth) and another group with a placebo shampoo. What are theindependent (IV) and dependent (DV) variables?A) IV: If they used Shampoo X or the placebo shampoo DV: How long their hair grew relative to before the treatmentB) IV: How much shampoo was used DV: If they used Shampoo X or the placebo shampooC) IV: If they used Shampoo X or the placebo shampoo DV: How much shampoo is usedD) IV: How long their hair grew relative to before treatment DV: If they used Shampoo X or the placebo shampoo30) Why would an experimenter use the median instead of the mean to report information about a data set?31) If Paige’s t-test yields a p-value of 0.1, which of the following best describes what she can safely conclude?32) Which of the following is a true statement regarding hypothesis testing?