6. An investigator wants to assess the association between caffeine consumption and impaired glucose tolerance, a precursor to diabetes. A study is planned to include seventy participants. Each participant will be surveyed with regard to their daily caffeine consumption. In addition, each participant will submit a blood sample which will be used to measure glucose level. Identify the type of study proposed and indicate its specific strengths and weaknesses.
Inverse Normal Distribution
The method used for finding the corresponding z-critical value in a normal distribution using the known probability is said to be an inverse normal distribution. The inverse normal distribution is a continuous probability distribution with a family of two parameters.
Mean, Median, Mode
It is a descriptive summary of a data set. It can be defined by using some of the measures. The central tendencies do not provide information regarding individual data from the dataset. However, they give a summary of the data set. The central tendency or measure of central tendency is a central or typical value for a probability distribution.
Z-Scores
A z-score is a unit of measurement used in statistics to describe the position of a raw score in terms of its distance from the mean, measured with reference to standard deviation from the mean. Z-scores are useful in statistics because they allow comparison between two scores that belong to different normal distributions.
Given that 70 participants were included in the study conducted by the investigator. The study is non-randomized and the focus for the survey is to take blood sample. The study is therefore a cross-sectional study as the study is about the prevalence of the disease and is subject to opinion of group/individuals at any given time and results vary accordingly.
The strengths:
It will permit for the estimation of the prevalence of the amount of caffeine consumption and glucose level tolerance at any given point.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
