A random sample of 120 females results in 20 of them are cig…

A random sample of 120 females results in 20 of them are cigarette smokers. A random sample of 150 males results in 26 of them are cigarette smokers. A dietician tests to determine if the proportion of female smokers is lower than the proportion of male smokers. A hypothesis test was conducted at the 5% significance level and the p-value was found to be 0.456. Which of the below represents the center of the randomization distribution for this test?

Suppose a chemistry experiment was conducted where the mass…

Suppose a chemistry experiment was conducted where the mass of a chemical (in grams) is related to the time (in seconds) by the equation  . Let x represent the time and let y represent the mass of the chemical. If the mass of the chemical is 210 grams, which of the below represents the time elapsed?