A medical researcher wants to estimate the survival time of a patient after the onset of a particular type of cancer and after a particular regimen of radiotherapy.a. What is the variable of interest to the medical researcher?b. Is the variable in part a qualitative, quantitative discrete, or quantitative continuous?c. Identify the population of interest to the medical researcher.d. Describe how the researcher could select a sample from the population.e. What problems might arise in sampling from this population?
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.
A medical researcher wants to estimate the survival time of a patient after the onset of a particular type of cancer and after a particular regimen of radiotherapy.
a. What is the variable of interest to the medical researcher?
b. Is the variable in part a qualitative, quantitative discrete, or quantitative continuous?
c. Identify the population of interest to the medical researcher.
d. Describe how the researcher could select a sample from the population.
e. What problems might arise in sampling from this population?
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