State University Public relations staff at State U.phoned 850 local residents. After identifying themselves,the callers asked the survey participants their ages,whether they had attended college, and whether theyhad a favorable opinion of the university. The officialreport to the university’s directors claimed that, ingeneral, people had very favorable opinions about theiruniversity.a) Identify the W’s of these data.b) Identify the variables, classify each as categorical orquantitative, and specify units if relevant.c) Are you confident about the report’s conclusion?Explain.
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.
State University Public relations staff at State U.
phoned 850 local residents. After identifying themselves,
the callers asked the survey participants their ages,
whether they had attended college, and whether they
had a favorable opinion of the university. The official
report to the university’s directors claimed that, in
general, people had very favorable opinions about their
university.
a) Identify the W’s of these data.
b) Identify the variables, classify each as categorical or
quantitative, and specify units if relevant.
c) Are you confident about the report’s conclusion?
Explain.
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