Worksheet 3
I. Draw a boxplot for the following data (each number is the number of rainy days in
various years in CA): 5, 1, 8, 9, 2, 4, 9, 30
II. Two gas station owners want to know the dispersion of the number of cars that buy
gas there per day in 2014.
Lecture material review
Econ 15A labs
Calvin Cochran
Parameter vs statistic
A parameter is the result of using all members
of a population to measure something about
the population
99% of the time, this something will be the
mean (or a measure of centra
Worksheet Week 4
I. A gas station owner counted the number of cars that bought gas at their station on 10
random days, and these were the number of cars that bought gas each day:
39, 40, 41, 44, 50, 51, 52, 54, 54, 55
i. Find the AAD for this data:
ii.Fin
Worksheet 3
I. A gas station owner counted the number of cars that bought gas at their station on 10
random days, and these were the number of cars that bought gas each day:
39, 40, 41, 44, 50, 51, 52, 54, 54, 55
We first find the mean by adding the score
Worksheet 3
I. Draw a boxplot for the following data (each number is the number of rainy days in
various years in CA): 5, 1, 8, 9, 2, 4, 9, 30
First, rearrange from least to greatest: 1,2,4, 5, 8, 9, 9, 30
Then, divide this data into two groups: (1,2,4,5)
NAME: _
I.D.: _
TEST ONE
PROBABILITY AND STATISTICS, ECON 15A
OCTOBER 9, 2015
Use the following for questions 1-7. A researcher is investigating alertness. She asked 20 subjects who habitually had either 6, 7, 8, or 9
hours of sleep every night to complet