Descriptive statistics and mean-level comparisons

Assignment Help Science

Reference no: EM13653550

12. Barker and colleagues (2012) compared 61 parents of children who had a serious mental illness (SMI) to 321 parents of children without such an illness. The researchers examined the parents' reported levels of stress, their levels of a hormone called cortisol (levels of this hormone provide an indication of chronic stress), and their use of several types of medication. The table below shows the results of the study. Focusing on the parents' number of stressors (the first row of the table) and the parents' use of medications for anxiety or depression (the last row in the table), explain these results to a person who knows about the t test for a single sample but is unfamiliar with the t test for independent means.

Descriptive Statistics and Mean-Level Comparisons
SMI Parents Comparison Parents
N = 61 N = 321
Mean SD Mean SD t p
Stress
Number of stressors 0.65 0.56 0.42 0.37 -3.08 0.00
Stress severity sum 1.89 1.63 1.16 1.1 -3.3 0.00
Cortisol (nmol/L)
Wake 17.46 10.72 16.75 7.38 -0.14 0.90
Out of bed 22.83 11.48 24.19 10.59 1.13 0.26
Bed 5.72 8.56 4.22 5.57 -1.86 0.06
Cortisol awakening
response 5.62 9.7 7.48 8.34 1.55 0.12
Decline from out of bed 17.13 11.35 20.11 10.71 1.97 0.05
Medication use (proportion)
Allergy 0.26 0.44 0.16 0.37 -1.71 0.09
Steroid 0.2 0.4 0.12 0.33 -1.32 0.19
Hormone 0.13 0.34 0.14 0.35 0.25 0.80
Anxiety or depression 0.26 0.44 0.12 0.33 -2.36 0.02

Reference no: EM13653550

Questions Cloud

Five thousand joules of heat is put into a carnot engine : Five thousand joules of heat is put into a Carnot engine whose hot and cold reservoirs have temperatures of 600 and 200 K, respectively. How much heat is convertedd into work?

Ecological theory to discuss how each of bronfenbrenner : Ecological Theory to discuss how each of Bronfenbrenner's five

Explain some 2-methyl-2-butene can be produced : Some 2-methyl-2-butene can be produced as a by- product of tert-pentyl chloride synthesis. Provide two mechanisms (E1 and E2) for its formation.

A cardiac pacemaker can be affected : A cardiac pacemaker can be affected by a static magneticfield as small as 1.7 mT. How close can a pacemaker wearer come toa long, straight wire carrying 18 A?

Descriptive statistics and mean-level comparisons : Descriptive Statistics and Mean-Level Comparisons

Maintained in a single circular loop with a circum ference : A current of 10.0 mA is maintained in a single circular loop with a circumferenceof 1.60 m. A magnetic fieldof0.550 T is directed parallel tothe plane of the loop. What is the magnitude of the torque exertedby the magnetic field on the loop?

Determine what is the acceleration of the rocket : An astronaut notices that a pendulum which took 2.45 {\rm s} for a complete cycle ofswing when the rocket was waiting on the launch pad takes1.26 {\rm s} for the same cycle of swingduring liftoff. What is the acceleration of the rocket

State the balanced equation for reaction between iron : Write the balanced equation for reaction between iron (II) and permanganate ion.Equation must balance as to show both mass and charge.

Why are there so many different theories of development : Why are there so many different theories of development

User Account

All Pages