In a study of parents who have children with attention-deficit/hyperactivity dis

Question

In a study of parents who have children with attention-deficit/hyperactivity disorder (ADHD), parents were asked to rate their overall stress level using the Parental Stress Scale (PSS). This scale has 18 items that contain statements regarding both positive and negative aspects of parenthood. Respondents are asked to rate their agreement with each statement using a 5-point scale (1 = strongly disagree to 5 = strongly agree). The scores are summed such that a higher score indicates greater stress. The mean rating for the 50 parents in the study was reported as 52.93 with a standard deviation of 10.37.

(c) Find the 90% margin of error. (Round your answer to three decimal places.) 2.463 Find the corresponding confidence interval. (Round your answers to three decimal places.) 50.477 55.403

Explanation / Answer

Confidence Level= Sample+-Margin of Error

MoE = 2.463

CI = Sample Mean Rating +- MoE

Left interval = Sample Mean Rating - MoE= 52.93-2.463= 50.467

Right interval = Sample Mean Rating + MoE= 52.93+2.463= 55.393

Hope this helps :)

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