Definitions
The number we calculate to standardize a normally distributed variable
What is the z-score?
The mean of the standard normal distribution
What is 0?
The formula for degrees of freedom when calculating a single mean
What is n (sample size) -1?
The z-score of an observation of 70 with a mean of 50 and a standard deviation of 10?
What is 2?
The most common dataset we have used this semester
What is perfumes/colognes?
A random variable that is bell-shaped around the mean; has a complicated Probability Density Function
What is the Normal Distribution?
The standard deviation of the standard normal distribution
What is 1?
The larger the standard deviation, the ___ the confidence interval
The z-score of an observation of 15 with a mean of 40 and a standard deviation of 20?
-1.25
The topic of the most recent survey we have done in class
Do you own a surface/iPad?
The formula for calculating a z-score
(z-u)/sigma; u = mean, sigma = standard deviation
The larger the confidence level, the ___ the confidence interval
What is larger/wider?
The middle of a confidence interval where the sample consists of {3, 6, 8, 15}
What is 8?
What is STDEV.S()?
The percent of the time we capture the population mean within our confidence interval; we choose this value
What is the confidence level?
The % of observations within one standard deviation of the mean of a normal distribution
DAILY DOUBLE
What is smaller/narrower?
The magnitude of the error of a 95% confidence interval with a sample {3, 6, 8, 15}. Assume the population standard deviation is 4.5
What is 4.41?
The sport I play
What is soccer?
The midpoint of every confidence interval
What is the sample mean?
What is the width/flatness?
The z-score associated with a 95% confidence level
What is 1.96?
The t-statistic of infinite degrees of freedom for a 95% confidence interval?
What is 1.96?
The location of my office (bonus points for being able to give directions)
What is Reynolds 6002 (6th floor, across from the elevator towards the emergency exit stairs on the left)