solve all define the descriptive statistics

Answer the following questions (include the question and answers in your document) 1) Define "descriptive statistics" in one sentence. 2) Fully explain the use in research of descriptive statistics. Must have 2-3 full paragraphs 3) Provide and explain at least three examples of descriptive statistics. 4) Define "inferential statistics" in one sentence. 5) Fully explain "inferential statistics". Must have 2-3 full paragraphs 6) Provide at least three examples of inferential statistics 7) Fully explain the differences between inferential and descriptive statistics. 8) Fully explain how researchers use inferential statistics to evaluate sample data.Grades in a statistics course and an operations research course taken simultaneously were as follows for a group of students. Operations Research Grade Statistics Grade Other 9 8 Other Are the grades in statistics and operations research related? Use Q = U.U1 in reaching your conclusion. (a) Calculate the test statistic Xo. Round your answer to two decimal places (e.g. 98.76). (b) Are the grades for statistics and operations research related?5. The researcher collects data from a sample of 30 students and finds the sample mean number of hours students sleep is 6.2 hours. From this, the researcher concludes that college students in the United States are suffering from sleep deprivation. This is an example of: a. Descriptive statistics b. Inferential statistics c. Normal statistics d. Discrete statistics