Created by Jennifer Spanos and Vy Vo
We obtained our samples by using the entire population of
North Olmsted High School students from a numbered list. We first
took a random sample of 150 students from the list by using a random
generator. After getting 150 students, we sorted them out by their
last names in alphabetical order. Then we went to the schools
guidance office and looked up the selected students schedules. We then
assigned a survey to each sample student. Then we gave all the
surveys to our instructor to distribute to the teachers.
AP STATS SURVEY JSVV
How many bathrooms are in your house?________________
How many people live in your house?___________________
The T-Test is used for this study.
Ho: the true average mean for
Salt Lake City's number of bathrooms per family unit
Ho: μ = 2
Ha: μ > 2
Significance level:
a=0.05
Assumptions:
This test requires a random sample and either a large sample
size or approximately a normal population distribution.
Since our sample was randomly chosen by the Minitab number
generator the sample size= 81, the T-Test is appropriate.
Computations:
We used a Ti-84 plus calculator and entered all the
information into a List, L1.
T= 5.719808963
P-value=8.88465 E -8
n= 81