Essays on Buchner

Part 1:

1. Calculate the sample size needed given these factors:

The factors given for calculating the sample size are as follows:

one-tailed t-test with two independent groups of equal size small effect size = 0.2 alpha = 0.05 beta = 0.2 Power = 1 – beta = 1 – 0.2 = 0.8

Using the priori function:

Using the priori function on GPower, the sample size based on the factors above was determined. The results of the analysis are as shown below.

Results:

t tests - Means: Difference between two independent means (two groups)

Analysis: A priori: Compute required sample size

Input: Tail(s) = One Effect size d = 0.2 α err prob = 0.05 Power (1-β err prob) = 0.8 Allocation ratio N2/N1 = 1 Output: Noncentrality parameter δ = 2.4899799 Critical t = 1.6473230 Df = 618 Sample size ...

Section

Introduction The purpose of this lab was to find the amount and percentage of nickel present in an unknown compound using the "mole method." The unknown nickel compound was dissolved in water and treated with dimethylglyoxime and ammonia solutions to obtain the precipitate of known chemical composition (bis(dimethylglyoximo)nickel(II)), which then was weighed and using this data the amount and percentage of nickel in the initial compound were found. The insoluble Ni(DMG)2 complex is formed in two steps. First, the dimethylglyoxime reacts with hydroxide ion formed through the ammonia hydrolysis to produce dimethylglyoximate anion: C4H8N2O2( ...

Q1. What is the effect of VLSM therapy on state anxiety levels, as measured by the STAI?

Q2. What is the effect of VLSM therapy on perceived stress levels, as measured by the PSS? Research Method

This will be a prospective, randomized, controlled clinical trial designed to examine the effects of VLSM meditation therapy (Solfanelli, 2010) on state anxiety levels and perceived stress levels. As previously noted, state anxiety will be operationally defined as scores on Spielberger’s State-Trait Anxiety Inventory (STAI), whereas stress will be operationally defined as scores on the Perceived Stress scale (PSS).

Audio-visual stimulation (AVS) ...