Question

Problem 1: Probability Using Standard Variable z and Normal...

Problem 1: Probability Using Standard Variable z and Normal Distribution Tables

Variables are the things we measure. A hypothesis is a prediction about the relationship between variables. Variables make up the words in a hypothesis.

In the attention-deficit/hyperactivity disorder's (ADHD's) hypothetical example provided in the tables below, the research question was: What is the most effective therapy for ADHD? One of the variables istype of therapy.Another variable ischange in ADHD-related behavior,given exposure to therapy. You might measure change in the mean seconds of concentration time when children read. This experiment is designed to obtain children's concentration times while they read a science textbook and to find out whether the therapy used worked on any of the children.

Use the stated and to calculate probabilities of the standard variable z to get the value of p (up to three decimal places). In addition, respond to the following questions for each pair of parameters:

• Which child or children, if any, appeared to come from a significantly different population than the one used in the null hypothesis?
• What happens to the "significance" of each child's data as the data are progressively more dispersed?

Table 3( = 100 seconds and = 30)

ChildMean seconds of concentration in an experiment of readingz-scorep-value175-0.83281-0.63389-0.37499-0.0351150.5061270.0971381.2781391.3091421.40101481.60

Table 4( = 100 seconds and = 40)

ChildMean seconds of concentration in an experiment of readingz-scorep-value175-0.63281-0.48389-0.28499-0.0351150.3861270.6871380.9581390.9891421.05101481.20