Question 7.1.4 Your statistics teacher, knowing the power of sampling, decides to use only 3 of your 5 quiz grades in assigning your grade for the course, chosen at random. Your quiz grades are shown below. Quiz Score 1 92 87 3 64 4 90 5 75 Round your answers to 2 decimal places. a) Compute the mean, variance, and standard deviation of all 5 quizzes. Mean - |. Variance - „Standard deviation - b) List all 10 possible samples of size 3, and find the mean, variance, and standard deviation of the sampling distribution. . Variance - .Standard deviation - Mean - c) What do the population distribution and the sampling distribution have in common? What is different? The are the same, but the v of the sampling distribution are v than one of the population distribution.
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.
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