Mathematics, 13.11.2020 05:30, prettygirllniyiaa
A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness, researchers placed an ad online asking volunteers to participate in the study, and 100 subjects replied. They are informed that one group will receive a new cream and the other group will receive a cream with no active ingredient. The researchers believe that sun exposure may affect the cream’s effectiveness. The subjects are then asked about their outdoor activity, and 42 of the subjects state they spend more than 50% of their day outside. The 42 subjects are randomly assigned to the two treatments. The remaining 58 subjects are also randomly assigned to the two treatments. All subjects are exposed to poison ivy and given their cream. They are asked to return in three days and report their level of irritation.
Is this a randomized block design?
Yes, the subjects could be randomly assigned to two different treatments.
Yes, the participants are grouped by sun exposure, and then both treatments are randomly assigned within each group.
No, the groups have an equal number of subjects.
No, the subjects were not paired by age to determine if it affected the cream’s effectiveness.
Answers: 3
Mathematics, 20.06.2019 18:04, lerinmarie
hep the ratio of the weight of shawn's dog to the weight of andy's dog is 5: 7 shawn's cat weight 23kg approimately how much does andy's dog weigh
Answers: 1
Mathematics, 21.06.2019 16:30, dominickstrickland
The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not
Answers: 1
A new cream was developed to reduce the irritation caused by poison ivy. To test the effectiveness,...
English, 11.11.2020 05:30
Mathematics, 11.11.2020 05:30