In a binomial distribution with sample size 20 and probability of success of .67, if you want to find the probability of 12 successes, you would calculate:

In a class of 60 people, 35 are 1st year students and 25 are 2nd year students. Calculate the percent of the class who are 1st year students and the percent who are 2nd year students. Show your work. Round your answers to the nearest percent.

In statistics, a population does not always consist of people.

A portion of a population is called a:

Which kind of sample allows each unit in a population to have an equal chance of being picked, and eliminates bias?

A data set is normally distributed with a mean of 40 and standard deviation of 10. According to the Empirical Rule, what percent of the data is between 20 and 50? (SHOW YOUR WORK AND/OR EXPLAIN WHAT YOU DID!)

What is the mode of the data set {3, 4, 4, 5, 5, 5, 7, 8, 9, 10, 10, 10, 11} ?

What is the tension T1T_1​ in the horizontal cable supporting the -N cat burglar, given that

Researchers at a public university in New England wanted to study the prevalence of food insecurity among students at their university. They posted flyers in several locations around campus asking students to participate in the study. The 237 students who responded to the flyers were asked to complete a survey concerning access to food and contributing factors. Of the students who completed the survey, 36 were food insecure. Which of the following best describes this sampling technique?

An independent school district has had an increasing number of student behavioral issues across the district in the last few years. In an effort to understand what behavioral issues are most commonly encountered and the strategies teachers are using to manage these issues, the district’s superintendent randomly selected five of the 30 schools in the district and interviewed each teacher at the five selected schools. What type of sampling was used?