Question

otherm ice were assigned to 24 hours of light (LL). Researchers observed Astudy looked at the effects of light on female mice. Fifty mice were randomly assigned to a regimen of 12 hours and 12 hours of dark (LDL while for two years. Five of the L ice and 10 of the LLe developed tumors. The accompanying tables the data complete parts a through Click the icon to view the datatable of the regimen and tumor development & Determine the percentage of the developed tumors from each group (Land ). Compare them and comment In the L o developed bumon the mo developed mor The Lov ed most them Was this scored experiment or an ervational How do you know? Datable m ent and novelopment OATHS com experiment because there were groups a n d by the researchers This was observation because there were goes that were awed by hercher This was onder bec ere were more than oice This was an only because there was a n and control group Can we conclude th o t 24 hours a day increase in tumors in mice? Why or why not? This was a red experiment and a contra experiment can never be done c on B. Because we a rvonal study can be concluded that for 24 hours a day cause in OCThis was obvional study and an observational study cover be used to causation D. Becaus e permet t can be conduted that for 24 hours a day caus Pinton i ntum

Answer 1

Given that op out of 1 and 12 assigned v hours of light 50 mice hours of which were dark (LO) 5 x 50 x 100 = 10% developed tumors out of 50 mice which were assigned 24 hours of (LL) 25 - TO kara loc = 75% developed tumors In the CD mice 10% developed tumas. In the developed tumas • The Lo mice develoned timers a lower rate than the w mice". 10% developed tumas. In the Ll mice 25% because 5) This was that were a combiotled experiment there lives two groups assigned by the researchers A is correct Option e Because it was a controled experiment, it can be concluded that light for 24 hours a day causes an increase in tumors in mice option Dis correct