Class: 0-<5 5-<10 10-<15 15-<20 20-<30 30-<40 40-<60 60-<90 Rel freq: 0.176 0.164 0.171 0.140 0.196 0.075 0.043 0.035 (a) Is it true that more than 50% of the sampled angles are smaller than 15°, as asserted by research O Yes, the proportion of sampled angles smaller than 15° is greater than 0.50. O Yes, the proportion of sampled angles smaller than 15° is not greater than 0.50. O No, the proportion of sampled angles smaller than 15° is greater than 0.50. O No, the proportion of sampled angles smaller than 15° is not greater than 0.50.
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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