# Complete the exercise Psychology Statistics Project (Statistics Project Sample)

Complete the exercise on Chapter 5, numbers 5.11, 5.13, 5.15, and 5.18

Chapter 8, numbers 8.10, 8.14, 8.16, 8.19, and 8.21

Book Wiley

Statistics

Student’s Name

Institutional Affiliation

Statistics

Chapter 5

Number 5.11

In any typical problem, the access to a standard normal table is gained through a z-score and the answer is read as a proportion. To this end, therefore, to determine the proportion of IQ scores on a Wechsler Adult Intelligence Scale (WAIS) in an approximated normal curve that has a mean of 100 and standard deviation of 15, then all we have to do is to determine the z-score. In the determination of the z-score, the original provided score is expressed as a deviation from its mean after which the deviation is split into standard deviation units. Therefore;

* The proportion of IQ scores above Kristen’s 125 is calculated as;

=(Original Score-Mean)Standard Deviation

=125-10015

= 1.6667

* The proportion of IQ scores below 82 is calculated as;

=(Original Score-Mean)Standard Deviation

=82-10015

= -1.2

* The proportion of IQ scores within 9 points of the mean is calculated as;