what is Probability sampling and non-probability sampling

In a cohort study men were classified as having high or low cholesterol levels. Among the group with low cholesterol levels there were 45 heart attacks in 6000 person-years of follow-up and among the group with high cholesterol levels there were 100 heart attacks in 4000 person-years of follow-up. How much heart attacks could theoretically be prevented among men with high cholesterol if nobody had high cholesterol? State the measure and calculate it

Discuss at least 2 different data collection methods you could use.  What are the differences between probability and nonprobability sampling methods?

Which of the following appraisal methods is the graphic rating scale?    Behavioral   Results   Comparative    Trait

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Mabbly Marketing conducted a study includes 200 sports enthusiast and obtained the following data: Sports College No College Preference Degree Degree NBA 40 55 NFL 10 95 What is the probability that a randomly selected survey participant prefers the NFL? 0.5880 0.5250 0.2000 0.6050

Seven steps in hypothesis testing for real world scenario of clothing

can you explain three outpots of coNNNNONication martris model with some examples ?

Explain how cluster sampling is different from stratified sampling

Develop a 1 year periodized program for a Major League Baseball population. Use the traditional periodization model and align your periods with the four sport seasons. Explain why you made the selections of frequency, load, duration, and specific exercises.