Puberty began for molly when she was 9 years old. her mother began puberty at 11 years. for her grandmother, the onset was at 13 years of age. these changes in the age of the onset of puberty over time are referred to as a trend.

What was different about warfare in the early 1800s and early 1900s?

Dr. redbull conducts a study to determine whether her new energy drink children perform better on spelling tests. she randomly assigns children to one of two groups: group 1 receives her energy drink and group 2 receives water. she then gives both groups a spelling test and compares the results. which of the following is true about this study? a. group 1 is the dependent variable and group 2 is the independent variable. b. this is a correlational study. c. group 2 is the experimental group. d. the independent variable is the type of drink the children receive.

At what age must a person begin receiving their roth 401(k) payments?