Question:

In the article by Gadd and Phipps (2012), they refer to the challenges faced by psychological and, specifically, neuropsychological assessment. Their study focused on a preliminary standardisation of the Wisconsin Card Sorting Test (a non-verbal measure) for Setswana-speaking university students. The US normative sample is described as participants (N = 899) from both genders who were screened beforehand to exclude individuals with a history of neurological, learning, emotional and attention difficulties. The South African sample consisted of university students (N = 93) from both genders, between the ages of 18 and 29, who were screened in terms of hearing and visual impairments and any history of psychiatriceurological difficulties. The latter was done to prevent contamination of the results by these variables. The students were from the University of Limpopo, Medunsa Campus. Answer Questions 1 to 5.

Question 5

Gadd and Phipps (2012) found that the results of the South African sample on the Wisconsin Card Sorting Test did not resemble a normal distribution and could not be converted to a normal distribution. This implies that the ...

(1) mean performance of this sample cannot be calculated

(2) standard deviation will differ below and above the mean

(3) mean and standard deviation do not provide a predetermined distribution of performance

(4) results cannot be replicated

Would 1 be the correct answer?

(a) Recall that the current policy is to investigate a cost variance if it exceeds $2,201 for either process. Assume that cost variances are normally distributed and that both Process A and Process 5 cost variances are in control. Find the probability that a cost variance for Process A will be investigated. Find the probability that a cost variance for Process B will be investigated. Which in-control process will be investigated more often. Process A Process B [Click to soloct) w| is investigated more often (bj Assume that cost variances are normally distributed and that both Process A and Process 8 cost variances are out of control. Find the probability that a cost variance for Process A will be investigated. Find the probability that a cost variance for Process B will be investigated. Which out-of-control process will be investigated more often Process A Process B (Click to soloct) w| is investigated more often. (c) If both Processes A and B are almost always in control, which process will be investigated more often. [Click to select) | will be investigated more often. (d) Suppose that we wish to reduce the probability that Process B will be investigated (when it is in control) to .3300. What cost variance investigation policy should be used? That is, how large a cost variance should trigger an investigation? Using this now policy, what is the probability that an out-of-control cost variance for Process B will be investigated? Pix > 4,527)\fLet g (t) be the rectangular pulse shown below. The random process X (t) is defined as X(t) = Ag(t), where A is uniformly distributed between -1 and +1. 0 (1, if 0