Data from the Department of Motor Vehicles indicate that 80% of all licensed drivers are older than age 25. a. In a sample of n = 50 people who recently received speeding tickets, 33 were older than 25 years and the other 17 were age 25 or younger. Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers? Use a = .05. b. In a sample of n = 50 people who recently received parking tickets, 36 were older than 25 years and the other 14 were age 25 or younger. Is the age distribution for this sample significantly different from the distribution for the population of licensed drivers? Use a = .05.
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.
Data from the Department of Motor Vehicles indicate
that 80% of all licensed drivers are older than age 25.
a. In a sample of n = 50 people who recently received
speeding tickets, 33 were older than 25 years and
the other 17 were age 25 or younger. Is the age
distribution for this sample significantly different
from the distribution for the population of licensed
drivers? Use a = .05.
b. In a sample of n = 50 people who recently received parking tickets, 36 were older than 25 years
and the other 14 were age 25 or younger. Is the age distribution for this sample significantly different
from the distribution for the population of licensed
drivers? Use a = .05.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 6 images
