On a candy production line, 3% of bags are overfilled. An employee randomly selects 100 bags and finds that 5% are overfilled. A second employees takes another random sample of 250 bags and finds that 2% are overfilled. Which of the following explains why there is a difference between the two percentages? a. Random error; the numbers were different due to variability inherent in sampling.
b. The samples were not random samples.
c. Both samples suffered from non-response bias.
d. The sample sizes were both too small, which is why they both obtained figures different than 3%

Solve each quadratic equation by factoring and using the zero product property. [tex]x^2+6x+8=0[/tex]

Answer each of the questions for the following diagram: 1. what type of angles are these? 2. solve for x. what does x equal? 3. what is the measure of the angles?

Arandomized controlled trial is designed to evaluate the effect of metoprolol in patients with heart failure. while preparing for statistical analysis, the researcher reviews some common types of statistical errors. which of the following statements is true regarding a type i error in a clinical study? a. the study is not significantly powered to detect a true difference between study groups. bthe null hypothesis is true but is rejected in error. c. the null hypothesis is false but is accepted in error. d. type i error is also known as beta and is usually 0.1 or 0.2. e. type i error depends on the study's confidence interval.