Concession stand sales for the first 6 games of the season averaged $400.00. If the total sales of the first 5 games were $320, $540, $230, $450, and $280, what were the total sales for the sixth game?
The mean of a data sample was calculated and subtracted from each data value in the sample. Each difference was then squared, and the squared differences were then added together. Finally, the sum of the squared differences was divided by 1 less than the number of data values. What is the term used to describe the result after the square root is taken?
Sample Standard Deviation
Population Standard Deviation
The cafeteria worker surveyed students in the lunch line about what was their favorite kind of pizza. The workers decide to survey the first 150 students that come into the cafeteria on Monday morning. Which of these best describes why this type of sampling may give biased results?
Students are randomly selected.
The sample size is too small.
Not all students have the same chance to complete the survey.
Every other student entering the cafeteria should be surveyed.
In a recent survey of 160 people, 31% said that they spend at least $50 a day on everyday expenses. What is the margin of error for this survey?
(12.7, 17.3) represents the interval for 68% of the data. If σ = 2.3, find the mean.