A. Researchers examined the relationship between colaconsumption and bone loss after fifty. One thousand women wererandomly sampled, everyone's cola consumption was recorded over atwo month period of time, and bone density measures were alsorecorded. Researchers found that the more cola consumed, the lowerthe level of bone density. They concluded that cola consumptionleads to loss of bone density.
What type of study is this research and why?
Identify the variables.
Evaluation the internal validity.
B. Researchers examined differences in attitudes towardsdrinking between high school freshman and high school seniors. 400students completed questionnaires that included information aboutdrinking attitudes. The researchers found that older studentsmaintained more liberal attitudes towards drinking than youngerstudents. The researchers concluded that attitudes towards drinkingand alcohol become more liberal with age.
What type of study is this research and why?
Identify the variables.
Evaluation the internal validity
