Mathematics, 24.11.2021 22:30, cannan
In 1954, Jonas Salk conducted a large-scale controlled experiment involving over 400,000 children to test the effectiveness of a polio vaccine. Each child was randomly assigned to either a control group or an experimental group. Children in the control group were injected with salt water (a placebo); children in the experimental group were injected with the polio vaccine. The experiment was double-blind, meaning that neither the participants nor the researchers knew to which group each child was assigned. Every test subject was followed for six months.
Required:
a. What was the point of giving saline solution to the children who didn't get the vaccine? Explain briefly.
b. Would it have been possible to run this experiment in a double-blinded fashion?
Answers: 2
Mathematics, 22.06.2019 00:30, JGottem6489
If you invest 1,500 today in a bank that gives you a 5 percent annual interest rate, which of these items can you buy in two years? a. electronics worth $1,650 b. fitness equipment worth $1,700 c. a holiday package worth $2,000
Answers: 2
Mathematics, 22.06.2019 01:30, hilzepesqtatiana
A0.40 kg soccer ball is kicked so that its incoming velocity of 5 m/s is changed to an outgoing velocity of -25 m/s. what impulse does the player apply to the ball?
Answers: 3
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