Predicting the preference of all of the coffee shop customers based not the taste test results refers to
Randomizing the order in which the samples of each brand were given to each customer refers to
All American adults
In 2006, the General Social Survey asked "would you like to see more or less government spending on natural disasters?" Of the 1496 respondents, 723 responded "more" or "much more." The population consists of
The 1496 respondents
In 2006, the General Social Survey asked "would you like to see more or less government spending on natural disasters?" Of the 1496 respondents, 723 responded "more" or "much more." The sample consists of
A summary measure that is computed from a sample to describe a characteristic of interest is called
The proportion of teenagers in a nationwide survey who stated that they consumed alcohol on a regular basis.
The proportion of regional flights for United Airlines that were considered on-time during the month of December, 2007.
A lobbyist for a major airspace firm assigns a number to each legislator and then uses a computer to randomly generate ten numbers. The lobbyist contacts the legislators corresponding to these numbers. This technique produces a random sample.
A lobbyist for a major airspace firm wants to get the opinion of state legislators on an issue of importance to his industry. The lobbyist contacts 10 state legislators at the Top of the Mark Restaurant during a lunch break and each one is polled about the issue. This technique products a random sample.
The amount of time spent watching television or playing video games is considered a significant factor on predicting childhood obesity. 290 parents of school-aged children were asked to estimate the number of hours per week that their child spend watching television or playing video games. This is an example of what type of variable?
Your statistics teacher has gathered information on each of the students in your class in order to illustrate the difference between categorical and quantitative variables. For each student, she has recorded their major, gender, age and height. The variable "major" is an example of what type of variable.
The number of calls received between 8 a.m. and 5 p.m. by a technical support professional.
If a distribution is very highly skewed, the mean is usually preferred over the median because it better represents what is typical.
In skewed distributions, we expect the values of the mean, median, and mode to be approximately equal, since they are all measures of center.
The following statement refers to which aspect of a statistical study: "The average age of the students in a statistics class is 25 years?"
The average weekly amount spent on groceries by a family of four based on a random sample of 100 families.
To estimate the percentage of defective items a machine is producing, a quality control analyst inspects the first 100 items produced in a day. This technique products a random sample.
Property of R
R does not depend on which variable is treated as the response variable, r is always between -1 and 1, the closer r is to zero, the weaker the linear relationship between x and y, and r only measures the strength of the linear relationship between x and y.