A sample of midterm grades for five students showed the following results: 72, 65, 82,90, 76. Which of the following statements are correct, and which should be challenged asbeing too generalized?a. The average midterm grade for the sample of five students is 77.b. The average midterm grade for all students who took the exam is 77.c. An estimate of the average midterm grade for all students who took the exam is 77.d. More than half of the students who take this exam will score between 70 and 85
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 sample of midterm grades for five students showed the following results: 72, 65, 82,
90, 76. Which of the following statements are correct, and which should be challenged as
being too generalized?
a. The average midterm grade for the sample of five students is 77.
b. The average midterm grade for all students who took the exam is 77.
c. An estimate of the average midterm grade for all students who took the exam is 77.
d. More than half of the students who take this exam will score between 70 and 85
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