Which of the following is a ratio variable? O Gender O Shoe size O Number of older adults in a family O Temperature in CelsiusSalary frequency 30,000 3 40000 4 What is the mean salary ($) based on the sample data shown below? 45000 2Stem Leaf 34 34889 38 02577789 43 67899 44 00 What is the mode of the sample shown in the stem-and-leaf plot below? 45 4556699 Length | 38 | 9 represents 38.9 mgWhich of the following statements does NOT provide information about a measure of central tendency? O A. The mean age of first-time home buys is 33 years. O B. The median net worth under the age of 35 years is $11,100. O C. The national mean price of gasoline has fallen 3.5 cents per gallon in the last week. O D. Most babies take their first steps sometime between 9 and 12 months.What is the median for the sample shown in the heart rate graph above? Heart rate 90 85 80 72 70 58 55 Beats per min 1 2 3 4 5 6 7 8 9 Hours