The following data was obtained from 31 days of operation of a plant for the oxidation of ammonia (NH3) to nitric acid (HNO3). The nitric oxides produced are absorbed in a countercurrent absorption tower. The variable observed “daily percent stack loss" is an inverse measure of the over-all efficiency of the plant. The plant is considered to have "excellent performance" on days where the stack loss is less than 10% and it is considered to have “very poor performance" when the stack loss is 28% or higher. The data is: 56 12 43 28 18 18 19 20 10 14 14 13 11 12 9 7889 15 15 18 20 15 12 10 15 28 25 11 14 1. Draw a histogram of the data by hand and show the step to calculate the bar classes. Comment on the shape of the histogram of the sample. 1. Calculate the proportion of days when the plant has excellent performance (stack loss is less than 10% ) or when is it has very poor performance (stack loss 28% or higher). 2. Draw a stem and leaf plot by hand, which digit is the stem?

Clarissa has just completed her second semester in college. She earned a grade of A in her 5-hour discrete math course, a grade of C in her 1-hour sociology course, a grade of A in her 5-hour biology course, and a grade of F in her 1-hour philosophy course. Assuming that A equals 4 points, B equals 3 points, C equals 2 points, D equals 1 point, and F is worth no points, determine Clarissa's grade-point average for the semester. Clarissa's grade point average is- (Round to two decimal places as needed.) O Time Remaining: 03:23:59 Next MacBook Pro esc G Search or type URL # 24 4 5 7 8. delete 1 2 3 Y U P Q W tab G J K return A S caps lock C V shift .. .. レ の エ く6

The first picture is the question and the second is the ones that I need help with

For each of the variables described below, indicate whether it is a quantitative or a categorical (qualitative) variable. Also, indicate the level of measurement for the variable: nominal, ordinal, interval, or ratio. Make sure your responses are the most specific possible. Variable (a) Favorite TV game show (b) Letter grade (A, B, C, D, or F) (c) Temperature (in degrees Celsius) Type of variable O Quantitative O Categorical Quantitative Categorical Quantitative O Categorical Level of measurement O Nominal O Ordinal O Interval O Ratio O Nominal O Ordinal O Interval O Ratio O Nominal O Ordinal O Interval O Ratio x Ś