Reporting their comfort level on a 1 - 5 scale for “making an informative presen- tation to a large group,” 71 students gave a mean response of 2.87 with a standard deviation of 1.43. When reporting their comfort for “getting 100 pages of handouts in a course,” 70 students gave a mean response of 2.51 with a standard deviation of 1.22. Use a 0.01 signifi- cance level to test that the population mean for the first question is larger. Do a full 5-step write-up as we did in class.
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.
Reporting their comfort level on a 1 - 5 scale for “making an informative presen- tation to a large group,” 71 students gave a
Step by step
Solved in 2 steps with 1 images
