A survey when a large portion of people who do not have any college degree do not provide any information for the questions related to income is an example of what kind of bias?

A study is observational when the researcher controls the behaviors of their subjects.

A student at a college administers a survey to estimate the average number of miles driven weekly among on-campus students at USF. The student asks 200 other students that live on campus that they know through taking classes together if they will take the survey. What type of sampling has occurred?

A variable measured the percentage of questions answered correctly on an exam.   This variable type is This variable’s categorization is

3 students apply to a PhD program.  The program rejects 25% of all applicants.  Students are accepted and rejected independently of each other.  Let the random variable X represent the number of the 3 students who get rejected into the PhD Program.   What is the probability that 1 student is rejected to the program if it is known that at fewer than 2 students will be rejected? (round your answer to 4 decimal places) (Hint: Binomial distribution with P=25% and n=3, and conditional probability)

A variable measured someone’s stress level, the variable has the following values: Not stressed at all, only a little stressed, stressed, and very stressed.   This variable type is This variable’s categorization is

A pediatrician would like to study cholesterol level in children 2 to 6 years of age. He selected 5 patients and found their cholesterol levels to be: 185, 225, 250, 196, 179 The sample standard deviation of cholesterol level of this group of patients is? round your answer to 4 decimal places.

A pediatrician would like to study cholesterol level in children 2 to 6 years of age. He selected 5 patients and found their cholesterol levels to be : 185, 235, 210, 206, 169 The sample standard deviation of cholesterol level of this group of patients is? round your answer to 4 decimal places.

For a sampling distribution for proportions you cannot assume it follows a normal distribution if p-hat times sample size and 1-phat times sample size are both greater than ten.

A student at a college administers a survey to estimate the average number of miles driven weekly among on-campus students at USF. The student sends a questionnaire to the 35th person in each sampling interval, from a complete list of on-campus students provided by the registrar. What type of sampling has occurred?