Question

research study was conducted to determine if children with attention deficit/hyperactivity disorder, ADHD, have smaller brains than children without the condition. She computed a z score of -1.73. Using a left tailed test of hypothesis, find the p-value, and at a 5% confidence level, determine if the data provides evidence that children with ADHD have smaller brains than the children without the condition. (10)

Answer 1

Answer:

Given,

test statistic z = - 1.73

Here it is left tailed test

P(z < - 1.73) = 0.0418151 [since from z table]

= 0.0418

Here p value < alpha(0.05) , so we reject null hypothesis Ho.

So there is sufficient evidence to support the claim.