For this series of observations find the mean, median, and mode 500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100
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 this series of observations find the mean, median, and
500, 600, 800, 800, 900, 900, 900, 900, 900, 1000, 1100
Nine rats run through a maze. The time each rat took to traverse the maze is recorded and
these times are listed below.
1 min., 2.5 min., 3 min., 1.5 min., 2 min., 1.25 min., 1 min., 0.9 min., 30 min.
(i) Which of the three measures of
this case?
(ii) Proceed to find the measure of central tendency recommended in part (i)
Find the sample variance and sample standard deviation for the sample data 21, 17, 13, 25,
9, 19, 6 and 10.
There are two roads between towns A and B. There are three roads between towns B and
C. How many different routes may one travel between towns A and C.
Find the probability of throwing at least one of the following totals on a single throw of a
pair of dice: a total 5, a total of 6, a total of 7.
Define the events A, B, and C as follows:
Event A: a total of 5 is thrown,
Event B: a total of 6 is thrown,
Event C: a total of 7 is thrown
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