The table shows the result of a restaurant survey. Meals Service good Service poor Total
Lunch 21
31 52
Dinner 45
25 70
Total 66
56 122
Find the probability the service was poor given that the meal was dinner
The probability the service was poor, given that the meal was dinner is
(Type an integer or a simplified fraction.)

Antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Which of the following circles have their centers in the third quadrant?

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.