Population vs sample
A beverage company wanted to see if people in the United States liked their new logo. Who is the population?
People in the united States
a subset of the population
What is sample
This symbol represents:
μ
What is the mean of a population
Using a larger sample size will reduce ____
variability (spread)
This teacher has taught at CHS since 1984
Mrs. Pearce
Verbal SAT scores of a sample of 300 students at a particular university had a mean of 592. According to the university's reports, verbal SAT scores of all students had mean 580. What is the parameter given?
580
the entire group of individuals we are making inferences about
the population
This symbol represents:
p-hat
What is sample proportion
What was the significance of the german tank problem? (What were they trying to determine?)
How many tanks the germans had.
This teacher has a daughter named Magnolia
Who is Ms.Treece?
Identify the population and the sample:
In a survey, 359 college students at the University of Jackson were asked if they had tried the October flavor of the month at the campus coffee shop. Eighty-three of the students surveyed said yes.
Population: All college students at the University of Jackson
Sample: The 359 college students who were surveyed
Numeric values that describe a population are known as...
What are parameters
This symbol represents:
s
What is the sample standard deviation
Random sampling helps avoid ___
bias
This AP was a wrestling coach for several years before becoming an AP.
Who is Mr McCready.
A quality control engineer at a car dealer randomly selects 30 painted points on a car and measures the paint thickness at each of those points. What is the population?
All painted points
numeric values that describe a sample
What is a statistic?
This symbol represents:
x-bar
What is the mean of a sample
A higher standard deviation means the data is more or less spread out?
more
This teacher has a hairless cat.
Ms. Barnes
Suppose we select a SRS of n=100 from a large population and found that 0.7 of them prefer hot weather to cold weather. That 0.7 is a ____
statistic
A_________ ______shows every possible result a statistic can take in every possible sample from a population and how often each result happens
Sampling Distribution
This symbol represents:
σ
What is the standard deviation of the population
What does SRS stand for?
simple random sample
Who are the Ohs?