a. A researcher asks each individual in a sample of 100 HACC students what month they were born. b. A researcher is interested in people’s adherence to New Year’s resolutions. The data from a large sample indicate that most people continue with their resolution for 1 or 2 weeks, but a few actually stick with their resolutions for the rest of their lives. c. Law school success is predicted by scores on the LSAT exam. d. A researcher is interested in the most popular pets owned by HACC students (dog, cat, bird, reptile, other).
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.
- For each of the following situations, identify the scale of measurement used to measure each variable and the measure of
central tendency (mean ,median , ormode ) that would provide the best description of the central score. Explain your answers.
a. A researcher asks each individual in a sample of 100 HACC students what month they were born.
b. A researcher is interested in people’s adherence to New Year’s resolutions. The data from a large sample indicate that most people continue with their resolution for 1 or 2 weeks, but a few actually stick with their resolutions for the rest of their lives.
c. Law school success is predicted by scores on the LSAT exam.
d. A researcher is interested in the most popular pets owned by HACC students (dog, cat, bird, reptile, other).
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