Convert to a decimal, rounded to the nearest hundredth:  711{“version”:”1.1″,”math”:”711″}

What is 7% of 1400?

  The survival curve above is from a clinical trial testing the difference between 10 and 80 mg of the statin drug Lipitor for the prevention of a Major Cardiovascular Event (MCE). The trial starts with ~5000 subjects in each group, and after 5 years of the trial we can see there are only 2300 individuals remaining in each group who are ‘at risk’- a reduction of just over 50% (~2500 participants in each group). However, if we look closely at the survival curve, only about 10% of subjects (~500 per group) actually experienced an MCE. Using your knowledge of survival analysis, explain and provide some rationale for this apparent discrepancy… i.e. why is there such a dramatic difference in subjects who are no longer on trial because they experienced an MCE (~500 per group) vs. the total number who are no longer ‘at-risk’ (~2500 per group)?   

What is the mode of the following set of numbers: 4, 4, 6, 8, 9, 4, 7?

What is the median of the following set of numbers: 7, 3, 9, 5, 2?

Which measure of dispersion is calculated as the difference between the highest and lowest values in a data set?

What is the mean of the following set of numbers: 4, 8, 6, 5, 3?

Which of the following statements is true about the relationship between sample size and confidence interval width?

The pie chart below displays the distribution of blood types (A, B, AB, O) among a group of 100 clients. What percentage of the clients have type O blood? Sales Chart.png

A study finds that 132 out of 465 rabbits have brown fur. What is the 80% confidence interval for the proportion of rabbits with brown fur?