The following frequency tables were designed using SPSS statistical software.
The tables represent three data sets in which descriptive statistics including the
mean (average), mode (most frequently occurring number), and the median were
calculated for ea

The gender and treatment variables were analyzed in both frequencies and
descriptive statistics. Running the descriptive the two variables through SPSS
gave data to reviews; the maximum, minimum, mean, and standard deviation.
Analyzing the two variables i

The following statistics are the results of data taken from the dataset (1) of Chapter 6.
The question being asked is; You are developing an instrument that measures vocational
preferences what people want to do for a living), and you need to administer t

Stat 216 Hypothesis Testing Worksheet
1. The EPA reports that the exhaust emissions for a certain car model has a normal distribution with a
mean of 1.45 grams of nitrous oxide per mile and a standard deviation of 0.4. The car manufacturer
claims their ne

The t-test
Inferences about Population Means
Questions
What is the main use of the t-test?
How is the distribution of t related to the unit
normal?
When would we use a t-test instead of a ztest? Why might we prefer one to the other?
What are the chief