Two chemical companies can supply a raw material. the concentration of a particular element in this material is important. the mean concentration for both suppliers is the same, but we suspect that the variability in concentration differ between the two companies. the standard deviation of concentration in a random sample of n1 = 10 batches produced by company 1 is s1 = 4.8 grams per liter, while for company 2, a random sample of n2 = 16 batches yields s2 = 5.7 grams per liter. is there sufficient evidence to conclude that the two population variances differ?

Construct the graph that models the given situation

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12

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.